The operator of the work camp must ensure that:
(1) Camp buildings and other structures are kept free, to the extent possible, of harborage for, and infestations of, insects and rodents.
(2) Any extermination or control measures involving insecticides, rodenticides, or herbicides strictly conform to the manufacturer's application instructions.
(3) The growth of brush, weeds, grass, and other plants is controlled within central camp areas to the extent necessary to eliminate harborage for ticks, chiggers, and similar insects of danger to public health.
(4) Ragweed, poison ivy, poison oak, poison sumac, and other similarly noxious plants do not grow on camp property within the area customarily frequented by humans.