1. The state milk board shall promulgate, adopt, and file with the secretary of state as prescribed by law such regulations as deemed necessary for the purpose of sections 196.931 to 196.953. Such regulations shall be enforced by the state milk board through either contractual agreements with political subdivisions of the state or employees of the state milk board. The adoption of regulations for the purpose of establishing a milk inspection program other than one under contractual agreement with the state milk board by any political subdivision is prohibited. Milk inspection by any political subdivision of the state except under contractual arrangements with the board is prohibited; provided the duly authorized official of any political subdivision of this state may take samples of such products which have been moved into, distributed within, or sold within the boundaries of such political subdivisions of this state for the sole purpose of determining that such milk and milk products comply with the standards developed by the state milk board. Nothing in sections 196.931 to 196.959 shall be construed as prohibiting any epidemiological investigations by the proper authorities of any political subdivision. A public hearing shall be held prior to the adoption of any regulation or modification thereof, upon notice published at least thirty days prior to the public hearings. At the public hearing, any person shall be permitted to appear and to be heard on the proposed regulations or modifications thereof. The standards of a regulation may exceed but shall not be less than those contained in the current edition of the Grade A Pasteurized Milk Ordinance of the United States Public Health Service as it exists or as it may be amended. The board may employ an executive secretary and adequate staff for administering sections 196.931 to 196.959, the cost of which shall be paid from the milk inspection fee fund.

2. No rule or portion of a rule promulgated under the authority of sections 196.931 to 196.959 shall become effective unless it has been promulgated pursuant to the provisions of section 536.024.