Article 1
The Annex to Directive 80/181/EEC is hereby amended as follows: 1. in point 1.1 of Chapter I the definition of the unit of length is replaced by the following: 'Unit of length A metre is the length of the path travelled in a vacuum by light during 1/299 792 458 seconds. (Seventeenth CGPM (1983), Resolution 1).'; 2. in section 4 of Chapter I: (a) the following is added to the table 1.2,4 // // // 'Quantity // Unit // // 1.2.3.4 // // Name // Symbol // Value // // // // // Blood pressure and pressure of other body fluids // Millimetre of mercury // mm Hg(*) // 1 mm Hg = 133,322 Pa // Effective cross-sectional area // Barn // b // 1 b = 10 -28 m2' // // // // (b) the note is hereby replaced by the following: 'The prefixes and their symbols listed in 1.3 may be used in conjunction with the above units and symbols, with the exception of the millimetre of mercury and its symbol. The multiple of 102a is, however, called a "hectare".' 3. in Chapter II: (a) the unit of measurement for blood pressure in the table is deleted; (b) the note is replaced by the following: 'The prefixes and their symbols listed in 1.3 of Chapter I may be used in conjunction with the above units and symbols, with the exception of the symbol "g".'