Any person applying pesticides to a lawn or to exterior landscape plants shall post a sign which meets the following requirements:
The sign shall remain in place for forty-eight (48) hours following the pesticide application, after which time the property owner is responsible for removal of the sign.
Subject to the penalties provided in the Pesticide Operations Act of 1977, effective April 18, 1978, as amended (D.C. Law 2-70; D.C. Official Code §§ 8-401et seq.), no person, acting alone or in concert with others, may alter or deface the sign, or remove the sign within forty-eight (48) hours of its posting.
D.C. Mun. Regs. tit. 20, r. 20-2212