Regulation 9

An inspector shall test weights with a view to passing as fit for use for trade and, where appropriate, stamping against appropriate local or working standard weights by the method of substitution on testing equipment which has been tested in accordance with the relevant provisions of the Weights and Measures (Local and Working Standard Weights and Testing Equipment) Regulations 1986:

Provided that the repeatability and discrimination threshold of the testing equipment used shall not exceed one-fifth of the relevant amount specified in column 2 of the relevant Table in Schedule 4 to these Regulations as the prescribed limit of error on passing as fit for use for trade for the weight which is being tested.

An inspector shall test weights with a view to the obliteration of the stamp, where appropriate, against appropriate local or working standard weights by the method of substitution or, if he considers it sufficient, by comparison, on testing equipment referred to in paragraph (1) above:

Provided that the repeatability and discrimination threshold of the testing equipment used shall not exceed one-half of the relevant amount specified in column 3 of the relevant Table in Schedule 4 to these Regulations as the prescribed limit of error in relation to the obliteration of the stamp for the weight which is being tested.