“Lactose reduced” may be included in the nomenclature of the product if there has been conversion of sufficient amounts of lactose to glucose or galactose so that the remaining lactose is less than 30 percent of the original lactose of the dairy product. Lactose reduced dairy products shall meet all other compositional standards for the products except that the minimum solids-not-fat content for reduced-fat, lowfat, or light (lite) milk, and flavored reduced-fat, lowfat, or light (lite) milk, labeled as “lactose reduced” shall be 8.7 percent.
Source:
Section 38895.2, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=FAC§ionNum=38895.2..