6 CFR §139.70

1. (a)Safe operation. All vehicle operators on Federal property must:
   1. (1)Drive/operate in a careful and safe manner at all times;
   2. (2)Possess a valid driver's/operator's license;
   3. (3)Comply with the lawful signals and directions of security personnel; and
   4. (4)Comply with traffic and safety signals and posted signs.
2. (b)Prohibited operations. All vehicle operators on Federal property or in areas outside Federal property that affect, threaten, or endanger Federal property or persons on the property, are prohibited from:
   1. (1)Blocking entrances, driveways, walks, loading platforms, fire hydrants, docking areas, or other passageways; and
   2. (2)Parking on or adjacent to Federal property in unauthorized locations, or contrary to the direction of posted signs.
3. (c)Responsibility. Registered vehicle owners will be responsible for violations of this section when the vehicle operator is not present.
4. (d)Enforcement. Security personnel may stop any vehicle that is observed operating on Federal property in violation of this section.
5. (e)Removal and seizure. Any vehicle used in violation of this section may be seized, removed, immobilized, towed, stored, marked with warning tags or notices, and booted in addition to any law enforcement actions or citations. All expenses incurred because of any seizure, removal, immobilization, towing, storage, marking, booting, or other law enforcement actions will be the responsibility of the owner, driver, operator, or other person using or operating the vehicle that is in violation of this section.