Cal. Food & Agric. Code § 32915

The labeling requirements of Sections 32912, 32913, and 32914 also apply to milk and cream which is sold in bulk to the wholesale trade and to milk and cream which is sold by any milk products plant for processing purposes. When any nonnutritive or artificial sweetener is added to any milk product or product resembling a milk product, the words “artificially sweetened” shall become a part of the name of the product, except milk products sweetened with sweeteners pursuant to Article 4 (commencing with Section 36670) of Chapter 1 of Part 3.