CA Food & Agric Code Section 33704.5

(a)

Any person who manufactures and directly serves frozen yogurt or nondairy frozen dessert in the manner specified in Section 33704, shall post on the premises where the manufacture and service takes place a sign, or signs, which (1) states that frozen yogurt or nondairy frozen dessert is served on the premises and (2) lists the ingredients in each of the products served.

(b)

The sign required to be posted pursuant to subdivision (a) shall be placed in a conspicuous location, such as on a menu or other sales device, and shall be printed in a legible manner that is understandable under normal conditions by the person purchasing the frozen products.