N.D. Cent. Code § 4.1-25-26
The laboratory procedures, equipment, chemicals, and other apparatus or substances used in the sampling, hauling, or testing of milk or milk products must conform to those described in the Standard Methods, a copy of which must be kept on file in the department. Any equipment, chemicals, or other apparatus or substance used in the sampling, hauling, or testing of milk or milk products not conforming to the requirements of this chapter may not be sold or offered for sale. The commissioner, through the adoption of rules, may alter, amend, or prohibit any specific requirement of this section and may approve other sampling, hauling, or testing procedures or equipment. The commissioner, when appropriate, may check calibration of farm bulk milk tanks and equipment.
N.D.C.C. § 4.1-25-26