(a) “Milk for Pasteurization” shall be used in the preparation of “milk products.”

(b) The “Milk for Pasteurization” used in the preparation of “milk products” shall be pasteurized or otherwise treated as indicated by the “secretary” during the preparation of “milk products.”

(c) Milk containers in which “Milk for Pasteurization” is received in milk plants for the preparation of “milk products” shall be thoroughly cleansed and dried before returning to a dairy farm or a milk plant.

(d) The rooms of buildings in which “milk products” are exposed during and after preparation shall be properly lighted, ventilated, drained, and clean, and shall be used for no other purpose than to provide a place for cleansed containers and utensils and for the handling of “milk products.”

(e) “Milk products” during and after preparation, and cleansed containers, utensils, and equipment shall be protected from flies.

(f) Milk plants in which “milk products” are prepared shall be provided with an adequate supply of steam or hot water for cleansing containers, utensils, and equipment.

(g) Equipment with which “milk products” come in contact shall be constructed in such a manner as to be easily cleansed. Demountable apparatus with which “milk products” come in contact shall be taken apart and cleansed each day such apparatus is in use. The secretary upon approval of the design, installation and operation of the system may permit in-place cleaning. Surfaces with which “milk products” come in contact shall be of smooth non-corrosive material and free from open seams.

(h) The milk plants in which “milk products” are prepared shall not be constructed nor altered until the plans and specifications thereof have received the approval of the “secretary.” Equipment before being installed shall likewise be approved by the secretary.