Pub. L. 105-391, tit. IV, sec. 412
SPECIAL RULE FOR TRANSPORTATION CONTRACTING SERVICES.
SEC. 412. SPECIAL RULE FOR TRANSPORTATION CONTRACTING SERVICES. Notwithstanding any other provision of law, a service contract entered into by the Secretary for the provision solely of transportation services in a unit of the National Park System shall be no more than 10 years in length, including a base period of 5 years and annual extensions for an additional 5-year period based on satisfactory performance and approval by the Secretary.