Sch 6 para 22
(1) No person may use for trade an automatic gravimetric filling instrument unless— (a) it is compliant with the essential requirements other than the provisions relating to permissible errors; (b) the instrument operates within the limits of the maximum permissible error determined in accordance with paragraph 23; (c) the requirements of paragraphs 24 and 25 are complied with; (d) it has been erected and installed in accordance with the requirements of paragraph 26; (e) subject to paragraph (f), where test fills are required these limits are determined on the basis of consecutive fills; and (f) in the case of an instrument of the description and maximum capacity set out respectively, in columns 1 and 2 of the Table set out in this paragraph, it is within the accuracy class specified for that instrument in column 3 or within an accuracy class of a higher level of precision than the specified class. Accuracy classes for automatic gravimetric filling instruments used for trade