Section 2-1-4-07-02-202.01 - Buildings:1. All buildings shall be of sound construction and kept in good repair and shall be of such construction as to prevent the entrance or harboring of vermin. All remodeling of buildings or new construction must be of concrete, concrete blocks, tile, or brick or other impervious material. Any remodeling or new construction must have the prior approval of the Commissioner.2. Outside openings: The doors, windows, skylights, and other outside openings of the plant shall be protected by properly fitted screens or other suitable devices against the entrance of flies and other insects. Screen doors shall open toward the outside of the building. Doors shall be provided with self-closing devices where necessary to prevent the entry of vermin into processing and storage rooms.2 Miss. Code. R. 1-4-07-02-202.01