The Commercial Space Transportation Office regulates and encourages the U. S. commercial space transportation industry. It licenses the private sector launching of space payloads on expendable launch vehicles and commercial space launch facilities. It also sets insurance requirements for the protection of persons and property and ensures that space transportation activities comply with U. S. domestic and foreign policy. Registration The agency provides a system for registering aircraft and recording documents affecting title or interest in the aircraft, aircraft engines, propellers, appliances, and spare parts.