33. (1) For the purposes of section 32, the actual measurement of a pre-packed article (“the offending article”) shall not be regarded as being less than a marked measurement unless—
(a) the deficiency in actual measurement of the offending article is greater than the deficiency permitted by the regulations for the article concerned; or
(b) the deficiency in the average of the actual measurements of a number of like articles (found in the same place and at the same time as the offending article is found) is greater than the deficiency permitted by the regulations for the article concerned.
(2) The regulations may—
(a) make provision with respect to the method to be used in determining the average measurement under paragraph (1) (b) and the number of like articles to be measured for that purpose;
(b) provide that the deficiency permitted in the average of measurements determined under paragraph (1) (b) is nil; and
(c) make different provisions according to how long after packaging of the article the measurements concerned are made.
(3) This section does not apply in a case where the number of like articles (found in the same place and at the same time as the offending article is found and available for measurement by an inspector) is not sufficient for the purposes of a determination under paragraph (1) (b) in accordance with the regulations.