The official final action methods of analysis for the determination of the components of milk, bulk milk, products of milk, or products resembling milk products, when such component determinations are required as a basis for payment or to meet a legal compositional requirement of this division, shall be as follows:
(a) Milk fat: Roese-Gottlieb
(b) Total Solids: AOAC Method
(c) Protein: Kjeldahl Procedure
(d) Lactose: Polarimetric Method
The procedural regulations required for official final action methods shall be adopted not later than April 1, 1979.
The director may, by regulation, adopt other acceptable methods of comparable accuracy.
Milk testing regulations in existence on December 31, 1978, shall remain in effect until replaced or eliminated by action of the director under the provisions of this section.