(1) Buildings and other structures must be maintained to be kept free of harborage for, and infestations of, pests and wildlife.

(2) Any extermination or control measures involving insecticides, rodenticides, or herbicides must strictly conform to the manufacturer's application instructions, and not be used within 100 feet of a drinking water well.

(3) The growth of brush, weeds, grass, and other plants must be controlled within the establishment to eliminate harborage of pests.

(4) The growth of ragweed, poison ivy, poison oak, poison sumac, and other similarly noxious plants must be controlled within the area of the establishment frequented by occupants.