(a) No person shall willfully disrupt the conduct of official business on the site, or engage in disorderly conduct; nor shall any person unreasonably obstruct the usual use of entrances, foyers, lobbies, corridors, offices, elevators, stairways, parking lots, sidewalks, or roads.

(b) No person shall litter or dispose of rubbish except in a receptacle provided for that purpose; nor shall any person throw articles of any kind from a building or from a motor vehicle or bicycle.