Seller to weigh or measure articles if requested

(1) Every person who in any shop, warehouse, store, market or public place sells any goods by weight or measure, whether on his own behalf or on behalf of the owner of such goods, shall on demand make by the person to whom the goods are to be delivered, (a) if the goods are sold by weight, weight the goods in a weighing instrument in the presence of that person; (b) if the goods are sold by volume or capacity, measure the goods in a measure of volume or capacity in the presence of that person; or (c) if the a goods are sold by linear measure, measure the goods using a measure of length in the presence of that person. (2) The provisions of subsection (1) of this section, shall not apply to the sale of pre-packaged goods.