Imitation ice cream shall contain a minimum of one and six-tenths pounds of food solids per gallon and shall weigh not less than 4.5 pounds per gallon. Imitation ice milk shall contain a minimum of one and three-tenths pounds of total food solids per gallon and shall weigh not less than 4.5 pounds per gallon. The determination of the weight of total food solids per gallon, and method of sampling, shall be the same as that set forth in Section 429, Article 5, subchapter 1, Title 3, Administrative Code.