Part II Working Standard Ccapcity Measures
4. Every working standard capacity measure—
(a) which is made of glass shall have been tested within 12 months before use;
(b) which is made of metal and
(i) is of 50 1 or less or 10 gal or less shall have been tested within 6 months before use;
(ii) is of more than 50 1 or 10 gal shall have been tested within 24 months before use.