California Code, Business and Professions Code - BPC § 12107.1

The secretary, by regulation, may establish a standard or standards of net weight or net measure, or net count of any commodity, except any manufactured commodity consisting of four or more staple ingredients. These standards, whenever applicable, shall be based upon published, official federal or state specifications and requirements or, in the absence of any published official specifications, upon established and accepted common usage. Any regulation shall be adopted, amended, or repealed in conformity with the provisions of Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code.

Whenever a standard, net weight, net measure, or net count has been established for any commodity, it is unlawful to sell the commodity by, at, or for a quantity greater or less than the standard.