§ 46-a. Regulations. The commissioner shall, after public hearing, promulgate definitions and standards for milk and milk products, and for products other than milk and milk products, which products are similar in appearance, odor or taste to milk and milk products, together with rules and regulations for the packaging and labeling of all such products, and other conditions relating to the manufacture, processing, packaging, distribution and sale of all such products including sanitation pertaining to manufacture, processing, handling, distribution, surroundings, grounds, equipment, personnel and pasteurization of such products. Such regulations shall apply to all sources including farms where such milk is produced. A copy of all such rules and regulations governing sanitation shall be provided to the state commissioner of health fifteen days prior to the public hearing. The commissioner is further empowered to promulgate rules and regulations by which milk may be standardized, including the plants at which such standardization may be done and may provide that standardization may be done only at plants which are duly licensed and specifically approved by the commissioner to perform such standardization. The commissioner may provide in such rules and regulations for different standards and labeling for products manufactured within the state and sold out of state.