ANNEX IVSupplementary provisions
ANNEX IV Requirements applying to conformity of production 0. Objectives 0.1. The conformity of production (CoP) procedure aims to ensure that each vehicle, system, component, separate technical unit, part or equipment produced is in conformity with the approved type. 0.2. Procedures include inseparably the assessment of quality-assurance management systems, referred to below as ‘initial assessment’ and verification and production-related controls, referred to as ‘product conformity arrangements’. 1. Initial assessment 1.1. Before granting type-approval, the approval authority shall verify the existence of satisfactory arrangements and procedures established by the manufacturer for ensuring effective control so that vehicles, systems, components or separate technical units when in production conform to the approved type. 1.2. Guidance for conducting assessments may be found in the EN ISO 19011:2011 standard — Guidelines for quality and/or environmental management systems auditing . 1.3. The requirement in point 1.1 shall be verified to the satisfaction of the approval authority granting type-approval. The approval authority shall be satisfied with the initial assessment and the product conformity arrangements in section 2 below, taking account — as necessary — of one of the arrangements described in points 1.3.1 to 1.3.3 or a combination of those arrangements in full or in part as appropriate. 1.3.1. The initial assessment and/or verification of product conformity arrangements shall be carried out by the approval authority granting the approval or by a technical service designated to act on behalf of that authority. 1.3.1.1. When considering the extent of the initial assessment to be carried out, the approval authority may take account of available information relating to: 1.3.1.1.1. the manufacturer’s certification described in point 1.3.3 below, which has not been qualified or recognised under that point; 1.3.1.1.2. in the case of type-approval of systems, components or separate technical units, quality system assessments performed by vehicle manufacturer(s) on the premises of the manufacturer(s) of the system, component or separate technical units, according to one or more of the industry sector specifications satisfying the requirements in the EN ISO 9001:2008 or ISO/TS16949:2009 standards. 1.3.2. The initial assessment and/or verification of product conformity arrangements may be carried out by the approval authority of another Member State, or the technical service designated for this purpose by that authority. 1.3.2.1. In such a case, the approval authority of the other Member State shall prepare a statement of compliance outlining the areas and production facilities it has covered as relevant to the product(s) to be type-approved and to the EU Regulations according to which these products are to be type-approved. 1.3.2.2. On receiving an application for a compliance statement from the approval authority granting type-approval, the approval authority of another Member State shall send forthwith the statement of compliance or advise that it is not in a position to provide such a statement. 1.3.2.3. The statement of compliance shall include at least the following: 1.3.2.3.1. group or company (e.g. XYZ automotive); 1.3.2.3.2. particular organisation (e.g. regional division); 1.3.2.3.3. plants/sites (e.g. engine plant 1 (in country A) — vehicle plant 2 ( in country B)); 1.3.2.3.4. vehicle/component range (e.g. all category LXe models); 1.3.2.3.5. areas assessed (e.g. engine assembly, body pressing and assembly, vehicle assembly); 1.3.2.3.6. documents examined (e.g. company and site quality manual and procedures); 1.3.2.3.7. date of the assessment (e.g. audit conducted from dd/mm/yyyy to dd/mm/yyyy); 1.3.2.3.8. planned monitoring visit (e.g. mm/yyyy); 1.3.3. The approval authority may also accept the manufacturer’s certification to the international EN ISO 9001:2008 or ISO/TS16949:2009 standard (the scope of this certification shall in that case cover the product(s) to be approved) or an equivalent certification standard as satisfying the initial assessment requirements of point 1.1, provided that conformity of production is indeed covered by the quality management system. The manufacturer shall provide details of the certification and undertake to inform the approval authority of any revisions to its validity or scope of that certification. 1.4. For the purpose of vehicle type-approval, the initial assessments carried out for granting approvals for systems, components and separate technical units of the vehicle need not be repeated but shall be complemented by an assessment covering the locations and activities relating to the assembly of the whole vehicle not covered by the former assessments. 2. Product conformity arrangements 2.1. Every vehicle, system, component, separate technical unit, part or item of equipment pursuant to a UNECE regulation annexed to the Revised 1958 Agreement and to Regulation (EU) No 168/2013 shall be so manufactured as to conform to the type approved by meeting the requirements of this Annex, the said UNECE regulation(s) and Regulation (EU) No 168/2013. 2.2. Before granting a type-approval pursuant to Regulation (EU) No 168/2013 and to a UNECE regulation annexed to the Revised 1958 Agreement, the approval authority shall verify the existence of adequate arrangements and documented control plans, to be agreed with the manufacturer for each approval, to carry out at specified intervals those tests or associated checks necessary to verify continued conformity with the approved type, including, where applicable, tests specified in Regulation (EU) No 168/2013 and the said UNECE regulation. 2.3. The holder of the type-approval shall, in particular: 2.3.1. ensure the existence and application of procedures for effective control of the conformity of products (vehicles, systems, components, separate technical units, parts or equipment) to the approved type; 2.3.2. have access to the testing or other appropriate equipment necessary for checking conformity to each approved type; 2.3.3. ensure that test or check result data are recorded and that annexed documents remain available for a period of up to 10 years to be determined in agreement with the approval authority; 2.3.4. analyse the results of each type of test or check, in order to verify and ensure the stability of the product characteristics, making allowance for variation in industrial production; 2.3.5. ensure that for each type of product, at least the checks and the tests prescribed in Regulation (EU) No 168/2013 and its delegated and implementing acts as well as set out in the referenced and applicable UNECE regulation therein are carried out; 2.3.6. ensure that any set of samples or test pieces giving evidence of non-conformity in the type of test in question gives rise to a further sampling and test. All the necessary steps shall be taken to restore the production process to ensure conformity with the approved type. 2.4. In the case of step-by-step, mixed or multi-stage type-approvals, the approval authority granting whole vehicle type-approval may request specific details regarding compliance with the conformity of production requirements set out in this Annex from any approval authority that granted type-approval of any relevant system, component or separate technical unit. 2.5. If the approval authority granting whole vehicle type-approval is not satisfied with the reported information referred to in point 2.4 and has communicated this in writing to the manufacturer in question and the approval authority granting type-approval for the system, component or separate technical unit, the approval authority granting whole vehicle type-approval shall demand additional conformity of production audits or checks to be performed at the site of the manufacturer(s) of those systems, components or separate technical units and the results shall immediately be made available to the approval authority concerned. 2.6. If points 2.4 and 2.5 apply and the further audit or check results are deemed not to be satisfactory in the opinion of the approval authority granting whole vehicle type-approval, the manufacturer shall ensure that conformity of production is restored as soon as possible by corrective actions to the satisfaction of the approval authority granting whole vehicle type-approval and to the satisfaction of the approval authority granting type-approval of the system, component or separate technical unit. 3. Continued verification arrangements 3.1 The authority which has granted type-approval may at any time verify the conformity of production control methods applied in each production facility by means of periodic audits. The manufacturer shall for that purpose allow access to the manufacture, inspection, testing, storage and distribution sites and shall provide all necessary information with regard to the quality management system documentation and records. 3.1.1. The normal approach for such periodic audits shall be to monitor the continued effectiveness of the procedures laid down in sections 1 and 2 (initial assessment and product conformity arrangements). 3.1.1.1. Surveillance activities carried out by the technical services (qualified or recognised as required in point 1.3.3) shall be accepted as satisfying the requirements of point 3.1.1 with regard to the procedures established at initial assessment. 3.1.1.2. The normal frequency of these verifications by the approval authority (other than those referred to in point 3.1.1.1) shall be such as to ensure that the relevant conformity of production controls applied in accordance with sections 1 and 2 are reviewed over a period consistent with the climate of trust established by the approval authority. 3.2. At every review, the records of tests and checks and production records, in particular records of those tests or checks documented as required in point 2.2, shall be available to the inspector; 3.3. The inspector may select random samples to be tested in the manufacturer’s laboratory or in the facilities of the technical service, in which case only physical tests shall be carried out. The minimum number of samples may be determined according to the results of the manufacturer’s own verification. 3.4. Where the level of control appears unsatisfactory, or when it seems necessary to verify the validity of the tests carried out in application of point 3.2, the inspector shall select samples to be sent to the technical service to perform physical tests according to the requirements regarding conformity of production set out in point 4 and in the UNECE regulations referred to in Regulation (EU) No 168/2013 or in its delegated acts. 3.5. Where unsatisfactory results are found during an inspection or a monitoring review, the approval authority shall ensure that all necessary steps are taken to restore conformity of production as rapidly as possible. 3.6. In cases where compliance with UNECE regulations is required by Regulation (EU) No 168/2013 or its delegated acts, the manufacturer may choose to apply the provisions of this Annex as an equivalent alternative to the conformity of production requirements in the respective UNECE regulations. However, if points 3.5 or 3.6 apply, all separate conformity of production requirements in the UNECE regulations have to be complied with to the satisfaction of the approval authority until it decides that conformity of production has been restored. 4. Conformity of production test requirements in cases of an unsatisfactory level of product conformity control as referred to in point 3.4. 4.1. Environmental and propulsion unit performance requirements 4.1.1. Test type I on emissions after cold start, type II on increased idle emissions and type VII on measurement of CO 2 emissions, fuel consumption, electric energy consumption and electric range determination 4.1.1.1. Vehicles shall be manufactured in conformity with the approved vehicle type. 4.1.1.2. Appropriate conformity of production checks shall be carried out to verify compliance with the conditions referred to in point 4.1.1.1. 4.1.1.3. Vehicles powered by an internal combustion engine only: 4.1.1.3.1. As a general rule, measures to ensure the conformity of production with regard to tailpipe and CO 2 emissions from vehicles are to be checked on the basis of the description in the type-approval certificate conforming to the model set out in Article 30(2) of Regulation (EU) No 168/2013. The control of production conformity is based on an assessment by the approval authority of the manufacturer’s auditing procedure in order to ensure conformity of the manufactured vehicle with respect to the tailpipe and CO 2 emissions. If the approval authority is not satisfied with the standard of the manufacturer’s auditing procedure, it may require that verification tests be carried out on vehicles in production. 4.1.1.3.1.1. Measurements of the tailpipe and CO 2 emissions of a vehicle type that has had one or several extensions shall be carried out on the vehicle(s) available at the time of the test (vehicle(s) described in the first document or in subsequent extensions). 4.1.1.3.1.1.1. Conformity of the vehicle for type I, tailpipe emissions after cold start and type VII, CO 2 emission test 4.1.1.3.1.1.1.1. Three vehicles shall be randomly selected from the series and tested according to the requirements set out in Articles 23 and 24 of Regulation (EU) No 168/2013. Deterioration factors shall be applied to the average of the test type I pollutant emission test results as follows: 4.1.1.3.1.1.1.1.1. If the durability method set out in Article 23(3a) of Regulation (EU) No 168/2013 is applicable, the deterioration factors shall be calculated from the type I emission test results up to and including full mileage referred to in Annex VII(A) to Regulation (EU) No 168/2013 and in accordance with the linear calculation method referred to in point 4.1.1.3.1.1.1.1.2 resulting in slope and offset values per emission constituent. The CoP pollutant emission results shall be calculated with the formula: Equation 4-1 : where: a = slope value determined according to test type V according to Annex V(A) to Regulation (EU) No 168/2013; b = offset value determined according to test type V according to Annex V(A) to Regulation (EU) No 168/2013; x = pollutant emission (HC, CO, NO x , NMHC and PM if applicable) test result per emission constituent of a degreened vehicle (maximum accumulated 100 km after the first start on the production line) in mg/km. y = CoP emission result per pollutant emission constituent in mg/km. The average CoP results shall be lower than the pollutant emission limits set out in Annex VI(A) to Regulation (EU) No 168/2013. 4.1.1.3.1.1.1.1.2. If the durability method set out in Article 23(3)(b) of Regulation (EU) No 168/2013 is applicable, the deterioration factor shall consist of the slope and offset value per emission constituent calculated to comply with test type V according to Annex V(A) to Regulation (EU) No 168/2013. Equation 4-1 shall be used to calculate the CoP emission results per pollutant emission constituent (y). 4.1.1.3.1.1.1.1.3. If the durability method set out in Article 23(3)(c) of Regulation (EU) No 168/2013 is applicable, the fixed deterioration factors, set out in Annex VII(A) to Regulation (EU) No 168/2013, shall be used as slope values with the offset value set to 0. Equation 4-1 shall be used to calculate the average CoP emission results per pollutant emission constituent (y). 4.1.1.3.1.1.1.1.4. The average test type VII results (CO 2 emissions, fuel/energy consumption and electric range if applicable) shall be lower than or equal to the declared values by the manufacturer at type-approval. 4.1.1.3.1.1.1.1.5. If the average emissions of the first two vehicles comply with the requirements laid down in point 4.1.1.3.1.1.1.1 then the production conformity is considered as satisfactory. 4.1.1.3.1.1.1.2. If the average emissions of the first two vehicles do not comply, the CoP procedure continues as follows: 4.1.1.3.1.1.1.2.1. If the authority is satisfied with the production standard deviation given by the manufacturer, the tests are carried out according to point 4.1.1.3.2. 4.1.1.3.1.1.1.2.2. If the authority is not satisfied with the production standard deviation given by the manufacturer, the tests are carried out according to point 4.1.1.3.3. 4.1.1.3.1.1.1.3. The production of a series is regarded as conforming or non-conforming, on the basis of tests on the three sampled vehicles, once a pass or fail decision is reached for tailpipe and CO 2 emissions according to the test criteria applied in the appropriate table. If no pass or fail decision is reached for tailpipe and CO 2 emissions, a test is carried out on an additional vehicle (see Figure 4-1). 4.1.1.3.1.1.1.4. In the case of periodically regenerating systems, the results shall be multiplied by the factor K i obtained at the time when type-approval was granted. At the request of the manufacturer, testing may be carried out immediately after a regeneration has been completed. Figure 4-1 Pass/fail criteria for Type I, II and VII testing Test on three vehicles Computation of the test statistic According to the appropriate table does the test statistic agree with the criteria for failing the series ? Series Rejected According to the appropriate table does the test statistic agree with the criteria for passing the series ? Series Accepted Test of an additional vehicle 4.1.1.3.1.1.2. Notwithstanding the environmental requirements set out in Article 23 and 24 of Regulation (EU) No 168/2013, the tests will be carried out on vehicles which have travelled a maximum distance of 100 km after first start at the production line. 4.1.1.3.1.1.2.1. However, at the request of the manufacturer, the tests will be carried out on vehicles which have been run in a maximum of 1 000 km. In this case, the running-in procedure will be conducted by the manufacturer, who shall undertake not to make any adjustments to those vehicles. 4.1.1.3.1.1.2.2. If the manufacturer asks to be allowed to conduct a running-in procedure (‘x’ km, where x ≤ 1 000 km), it may be carried out as follows: The tailpipe and CO 2 emissions will be measured at maximum 100 km after first start on the production line and at ‘x’ km on the first tested vehicle (which can be the type-approval vehicle); The evolution coefficient (EC) of the emissions between 100 km and ‘x’ km will be calculated as follows: Equation 4-2 : The value of EC may be less than 1. The subsequent vehicles will not be subjected to the running-in procedure, but their 100 km emissions will be modified by the EC. In this case, the values to be taken will be: The value at ‘x’ km for the first vehicle; The values at maximum 100 km multiplied by the evolution coefficient (EC) for the subsequent vehicles. 4.1.1.3.1.1.2.3. As an alternative to this procedure, the vehicle manufacturer can use a fixed EC of 0,92 and multiply all values of tailpipe and CO 2 emissions measured at zero km by this factor. 4.1.1.3.1.1.2.4. Tests for conformity of production may be performed with a commercial fuel of which the C3/C4 ratio lies between those of the reference fuels referred to in Annex II(A1) to Regulation (EU) No 168/2013 in the case of LPG, or of which the Wobbe index lies between those of the extreme reference fuels in the case of NG or H2NG. In that case, a fuel analysis shall be presented to the approval authority. 4.1.1.3.2. Conformity of production when manufacturer’s statistical data are available 4.1.1.3.2.1. The following sections describe the procedure to be used to verify the tailpipe and CO 2 emission conformity of production requirements when the manufacturer’s production standard deviation is again satisfactory. 4.1.1.3.2.2. With a minimum sample size of three, the sampling procedure is set so that the probability of a lot passing a test with 40 % of the production defective is 0,95 (producer’s risk = 5 %), while the probability of a lot being accepted with 65 % of the production defective is 0,1 (consumer’s risk = 10 %). 4.1.1.3.2.3. The following procedure is used (see Figure 4-1): Let L be the natural logarithm of the tailpipe emission limits set out in Annex VI(A) to Regulation (EU) No 168/2013 and the declared CO 2 type-approval emission value: x i = the natural logarithm of the measurement for the i-th vehicle of the sample; s = an estimate of the production standard deviation (after calculating the natural logarithm of the measurements); n = the current sample number. 4.1.1.3.2.4. Compute for the sample, the test statistic quantifying the sum of the standardised deviations to the limit and defined as: Equation 4-2 : 4.1.1.3.2.5. Then: 4.1.1.3.2.5.1. if the test statistic is greater than the pass decision number for the sample given in Table 4-1, a pass decision is reached; 4.1.1.3.2.5.2. if the test statistic is less than the fail decision number for the sample size given in Table 4-1, a fail decision is reached; 4.1.1.3.2.5.3. otherwise, an additional vehicle is tested according to Annex II(A) to Regulation (EU) No 168/2013 and the procedure is applied to the sample with one unit more. 4.1.1.3.2.5.4. Table 4-1 Pass/fail decision depending on sample size; conformity of production when manufacturer’s statistical data are available Sample Size (cumulative number of vehicles tested) Pass Decision No Fail Decision No (a) (b) (c) 3 3,327 –4,724 4 3,261 –4,79 5 3,195 –4,856 6 3,129 –4,922 7 3,063 –4,988 8 2,997 –5,054 9 2,931 –5,12 10 2,865 –5,185 11 2,799 –5,251 12 2,733 –5,317 13 2,667 –5,383 14 2,601 –5,449 15 2,535 –5,515 16 2,469 –5,581 17 2,403 –5,647 18 2,337 –5,713 19 2,271 –5,779 20 2,205 –5,845 21 2,139 –5,911 22 2,073 –5,977 23 2,007 –6,043 24 1,941 –6,109 25 1,875 –6,175 26 1,809 –6,241 27 1,743 –6,307 28 1,677 –6,373 29 1,611 –6,439 30 1,545 –6,505 31 1,479 –6,571 32 –2,112 –2,112 4.1.1.3.3. Conformity of production when manufacturer’s statistical data remain unsatisfactory or unavailable 4.1.1.3.3.1. The following sections describe the procedure to be used to verify the tailpipe and CO 2 emission conformity of production requirements when the manufacturer’s evidence of production standard deviation is either unsatisfactory or unavailable. 4.1.1.3.3.2. With a minimum sample size of three, the sampling procedure is set so that the probability of a lot passing a test with 40 % of the production defective is 0,95 (producer’s risk = 5 %), while the probability of a lot being accepted with 65 % of the production defective is 0,1 (consumer’s risk = 10 %). 4.1.1.3.3.3. The measurement of tailpipe and CO 2 emissions is considered to be log normally distributed and should first be transformed by taking the natural logarithms. Let m o and m denote the minimum and maximum sample sizes respectively (m o = 3 and m = 32) and let n denote the current sample number. 4.1.1.3.3.4. If the natural logarithms of the measurements in the series are x 1 , x 2 , …, x j and L is the natural logarithm of the pollutant emission limits set out in Annex VI(A) to Regulation (EU) No 168/2013 and the declared CO 2 type-approval value, then define: Equations 4-3 : 4.1.1.3.3.5. Table 4-2 below shows values of the pass (A n ) and fail (B n ) decision numbers against current sample number. The test statistic is the ratio and shall be used to determine whether the series has passed or failed as follows: for m o ≤ n ≤ m: 4.1.1.3.3.5.1. pass the series if ; 4.1.1.3.3.5.2. fail the series if ; 4.1.1.3.3.5.3. take another measurement if Table 4-2 Pass/fail decision depending on sample size; conformity of production when manufacturer’s statistical data are unsatisfactory or unavailable Sample Size (cumulative number of vehicles tested) Pass Decision No A n Fail Decision No B n (a) (b) (c) 3 –0,80380 16,64743 4 –0,76339 7,68627 5 –0,72982 4,67136 6 –0,69962 3,25573 7 –0,67129 2,45431 8 –0,64406 1,94369 9 –0,61750 1,59105 10 –0,59135 1,33295 11 –0,56542 1,13566 12 –0,53960 0,97970 13 –0,51379 0,85307 14 –0,48791 0,74801 15 –0,46191 0,65928 16 –0,43573 0,58321 17 –0,40933 0,51718 18 –0,38266 0,45922 19 –0,35570 0,40788 20 –0,32840 0,36203 21 –0,30072 0,32078 22 –0,27263 0,28343 23 –0,24410 0,24943 24 –0,21509 0,21831 25 –0,18557 0,18970 26 –0,15550 0,16328 27 –0,12483 0,13880 28 –0,09354 0,11603 29 –0,06159 0,09480 30 –0,02892 0,07493 31 0,00449 0,05629 32 0,03876 0,03876 4.1.1.3.3.6. Remarks The following recursive formulae are useful for computing successive values of the test statistic: Equations 4-4 : (n = 2, 3, …; ; v 1 = 0) 4.1.1.3.4. The type-approval authorities issuing the approval may at any time verify the methods applied in each production unit. 4.1.1.3.5 In every inspection, the records of tests and production monitoring shall be communicated to the visiting inspector. 4.1.1.3.6. The inspector may select at random the samples to be tested in the manufacturer’s laboratory. The minimum number of samples may be determined on the basis of the results of the manufacturer’s own checks. 4.1.1.3.7. When the quality standard does not seem satisfactory or when it seems necessary to verify the validity of the tests conducted under point 9.4.2.2, the inspector shall collect samples to be sent to the technical service which carried out the approval tests. 4.1.1.3.8. The type-approval authorities may carry out all the tests prescribed in this Annex. 4.1.1.4. Vehicles powered by a hybrid electric powertrain As a general rule, measures to ensure the conformity of production with regard to tailpipe and CO 2 emissions, electric energy consumption and electric range from hybrid electric vehicles is checked on the basis of the description in the type-approval certificate conforming to the model in Article 30(2) of Regulation (EU) No 168/2013. Checks on production conformity are based on an assessment made by the approval authority of the manufacturer’s auditing procedure in order to ensure conformity of the vehicle type with respect to the emission of tailpipe and CO 2 emissions, electric energy consumption and range. If the authority is not satisfied with the standard of the manufacturer’s auditing procedure, it may require that verification tests be carried out on vehicles in production. Conformity for tailpipe and CO 2 emissions is checked using the statistical procedures described in points 4.1.1.3.1 to 4.1.1.3.3. Vehicles are tested according to the procedure described in Annex II(A) to Regulation (EU) No 168/2013. 4.1.1.5. Replacement pollution control devices 4.1.1.5.1. In order to test conformity as required above, a sample replacement pollution control device shall be taken from the production line of the type-approved vehicle. 4.1.1.5.2. Production will be regarded as being in conformity with the provisions of this Annex if a representative parent vehicle equipped with a pollution control device randomly selected from the production line complies with the applicable requirements set out in Article 23 of Regulation (EU) No 168/2013 on environmental performance. The performance of the propulsion fitted to the representative parent vehicle shall be measured according to Annex II(A) to Regulation (EU) No 168/2013 and shall not exceed the propulsion unit performance of the original pollution control device it replaces. 4.1.1.6. Actions to be taken in case of non-conformity of production If, during inspections, non-conformity is observed, the approval authority shall ensure that all necessary steps are taken to re-establish conformity of production as soon as possible. 4.1.1.7. Penalties for non-conformities of production 4.1.1.7.1. The approval granted in respect of a vehicle type may be withdrawn if the requirements in point 4.1.1.1 are not complied with. 4.1.1.7.2. If a Member State withdraws an approval it has previously granted, it shall forthwith notify the other Member States. 4.1.2. Conformity of production for test type IV, evaporative emissions For routine end-of-production-line testing, the manufacturer may demonstrate compliance by sampling vehicles which shall meet the following requirements. Alternatively, the full test procedure described in this Annex shall be carried out. At the request of the manufacturer an alternative test procedure may be used, if the procedure has been presented to and has been accepted during the type approval procedure by the technical service to the satisfaction of the approval authority. 4.1.2.1. Test for leakage 4.1.2.1.1. Vents to the atmosphere from the evaporative emission control system shall be isolated. 4.1.2.1.2. A pressure of 3,7 kPa ± 0,1 kPa (370 ± 10 mm of H 2 O) shall be applied to the fuel system. 4.1.2.1.3. The pressure shall be allowed to stabilise prior to isolating the fuel system from the pressure source. 4.1.2.1.4. Following isolation of the fuel system, the pressure shall drop by no more than 0,5 kPa (50 mm of H 2 O) in five minutes. 4.1.2.2. Test for venting 4.1.2.2.1. Vents to the atmosphere from the emission control shall be isolated. 4.1.2.2.2. A pressure of 3,7 kPa ± 0,1 kPa (370 ± 10 mm of H 2 O) shall be applied to the fuel system. 4.1.2.2.3. The pressure shall be allowed to stabilise before the fuel system is isolated from the pressure source. 4.1.2.2.4. The venting outlets from the emission control systems to the atmosphere shall be reinstated to the production condition. 4.1.2.2.5. The pressure of the fuel system shall drop to below 1,0 kPa (100 mm of H 2 O) within two minutes. 4.1.2.3. Purge test 4.1.2.3.1. Equipment capable of detecting an airflow rate of 0,25 litre in one minute shall be attached to the purge inlet and a pressure vessel of sufficient size to have negligible effect on the purge system shall be connected via a switching valve to the purge inlet, or alternatively: 4.1.2.3.2. The manufacturer may use a flow meter of his own choice, if acceptable to the approval authority. 4.1.2.3.3. The vehicle shall be operated in such a manner that any design feature of the purge system that could restrict purge operation is detected and the circumstances noted. 4.1.2.3.4. Whilst the engine is operating within the bounds noted in this point the air flow shall be determined by either: 4.1.2.3.4.1. The device being switched in a pressure drop from atmospheric to a level indicating that a volume of 0,25 litre of air has flowed into the evaporative emission control system within one minute; or 4.1.2.3.4.2. An alternative flow measuring device with a detectable reading of no less than 0,25 litre per minute. 4.1.2.3.4.3. At the request of the manufacturer, an alternative purge test procedure can be used if the procedure has been presented to, and accepted by, the technical service during the type-approval procedure. 4.1.2.4. Control Methods 4.1.2.4.1. The approval authority which has granted type-approval may at any time verify the conformity control methods applicable to each production unit. 4.1.3. Test type VIII on sound level 4.1.3.1. Vehicle conformity regarding sound level Any vehicle manufactured shall conform to an approved type of vehicle and shall be equipped with the silencer with which it was type-approved and satisfy the requirements of Article 23 and Annex VI(D) to Regulation (EU) No 168/2013 relating to the type of vehicle concerned. 4.1.3.1.1. In order to test conformity as required above, a sample vehicle shall be taken from the production line of the type approved pursuant to this point 4.1.3. Production will be regarded as conforming to the provisions of this point if the sound level measured using the test method referred to in Annex VI(D) to Regulation (EU) No 168/2013 does not exceed by more than 3 dB(A) the value measured at the time of type-approval, nor by more than 1 dB(A) the limits laid down in this point. 4.1.3.2. Conformity of production of a non-original replacement exhaust system 4.1.3.2.1. Any exhaust system manufactured shall conform to a type approved pursuant to this point and satisfy the requirements of Annex VI(D) to Regulation (EU) No 168/2013 relating to the type of vehicle for which it is intended. 4.1.3.2.2. In order to test conformity as required above, a sample exhaust will be taken from the production line of the type approved pursuant to this point 4.1.3. 4.1.3.2.3. Production will be regarded as complying with this point 4.1.3 if the requirements of Annex VI(D) to Regulation (EU) No 168/2013 are satisfied and if the sound level measured using the test method referred to in that Annex does not exceed by more than 3 dB(A) the value measured at the time of type-approval. 4.1.4. Conformity of production (CoP) requirements regarding maximum design vehicle speed, maximum torque, maximum continuous rated power and maximum peak power 4.1.4.1. Maximum vehicle speed measurement tolerances during conformity of production (CoP) testing During a production conformity check, the maximum design vehicle speed may differ by ± 5 % from the value determined during the type-approval test. 4.1.4.2. Maximum torque, maximum continuous rated power, maximum net power and maximum peak power tolerances during CoP testing Table 4-3 Measurement tolerance on maximum torque, maximum continuous rated power, maximum net power and maximum peak power dependent on measured power Measured power Acceptable tolerance on maximum torque, maximum continuous rated power, maximum net power and maximum peak power < 1 kW ≤ 20 % 1 kW < measured power < 11 kW ≤ 10 % > 11 kW ≤ 5 % 4.1.5. Conformity of production (CoP) requirements regarding the mass in running order. The mass in running order of an L-category vehicle may deviate from the nominal value by no more than 8 % as regards the permissible lower and upper deviations, which is the negative and positive deviation around the declared nominal value of up to and including the mass in running order thresholds referred to in Annex I to Regulation (EU) No 168/2013. 5. Review of the acceptable tolerances of the mass in running order Irrespective of whether point 4 applies, Member States shall provide by 31 December 2019 to the Commission the statistics on the actual observed tolerances on the mass in running order when monitoring conformity of production. The statistics shall contain the mass in running order measured at type-approval and any positive or negative measured variation as a percentage of this type-approved mass in running order, observed during conformity of production assessment on the production line. Based on this data the Commission will assess whether or not it will be necessary to revisit the maximum allowable tolerance percentage laid down in point 4.1.5.