California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 33452

(a) A dairy cow farm that was marketing market milk, including milk that meets the definition of restricted use market milk, on August 1, 2005, shall not market manufacturing milk. However, annually on January 1 such a dairy may elect to market manufacturing milk for a 12-month period. This provision applies to a dairy cow farm that was marketing manufacturing milk on August 1, 2005, that subsequently obtains a market milk grade A permit, but does not apply if the facility is sold or leased to a new operator.A dairy cow farm that begins operation on or after January 1, 2006, shall not market manufacturing milk except as provided in this section.

(b) This section does not apply to dairy goat farms.