Virginia Code Title 5.1. Aviation § 5.1-123. Through routes, joint rates, etc., not required may be established

Common carriers or restricted common carriers of property by aircraft may establish reasonable routes and joint rates, charges, and classifications with other such carriers or with common carriers by railroad, motor vehicle, express and/or water;  and common carriers or restricted common carriers of passengers by aircraft may establish reasonable through routes and joint rates, fares, or charges with common carriers by railroad, motor vehicle, and/or water.  In case of such joint rates, fares or charges it shall be the duty of the carriers parties thereto to establish just and reasonable regulations and practices in connection therewith, and just, reasonable and equitable divisions thereof as between the carriers participating therein which shall not unduly prefer or prejudice any of such participating carriers.