13(1) Nothing in section 8 of this Act shall prevent any of the units of measurement mentioned in sub-paragraph (2) below being used for products or equipment which were placed on the market or used before 1st December 1980, other than weighing or measuring equipment (including weights).E+W+S
(2)The units of measurement referred to in sub-paragraph (1) above are the chain, furlong, rood, square mile, square inch, cubic yard, cubic foot, cubic inch, ton, hundredweight, cental, quarter, stone, dram, grain and quintal.