C.R.S. § 25-5.5-304

French ice cream, frozen custard, and French custard ice cream shall conform to the definition and standard of identity prescribed for ice cream by section 25-5.5-303 if one or more of the optional egg ingredients permitted by section 25-5.5-303 are used in such quantity that the total weight of egg yolk solids therein is not less than one and four-tenths percent of the weight of the finished French ice cream, except when any of the optional flavoring ingredients specified in section 25-5.5-303 (4)(d) to (4)(k) is used, in which case the weight of egg yolk solids shall not be less than one and twelve-hundredths percent of the weight of the finished French ice cream.