TRB's Airport Cooperative Research Program (ACRP) Legal Research Digest 11: Survey of Minimum Standards: Commercial Aeronautical Activities at Airports explores source material for adopting and enforcing minimum standards that airport owners and operators commonly impose on businesses that perform commercial aeronautical activities that occur at airports. Examples of aeronautical activities include aircraft fueling, line (ground handing) services, maintenance and repair, storage, rental and flight training/instruction, sales, and charter and management. The report also explores current practices in the area of minimum standards and includes a compendium of comparative minimum standards.