All persons entering in or on Federal property are prohibited from loitering, exhibiting disorderly conduct or exhibiting other conduct on property that—

(a) Creates loud or unusual noise or a nuisance;

(b) Unreasonably obstructs the usual use of entrances, foyers, lobbies, corridors, offices, elevators, stairways, or parking lots;

(c) Otherwise impedes or disrupts the performance of official duties by Government employees; or

(d) Prevents the general public from obtaining the administrative services provided on the property in a timely manner.