Pub. L. 85-726, tit. IV, sec. 404
Rates for Carriage of Persons and Property
Rates for Carriage of Persons and Property carrier’s duty to provide service, rates, and divisions Sec. 404. (a) It shall be the duty of every air carrier to provide and furnish interstate and overseas air transportation, as authorized by its certificate, upon reasonable request therefor and to provide reasonable through service in such air transportation in connection with other air carriers; to provide safe and adequate service, equipment, and facilities in connection with such transportation; to establish, observe, and enforce just and reasonable individual and joint rates, fares, and charges, and just and reasonable classifications, rules, regulations, and practices relating to such air transportation; and, in case of such joint rates, fares, and charges, to establish just, reasonable, and equitable divisions thereof as Between air carriers participating therein which shall not unduly prefer or prejudice any of such participating air carriers. discrimination (b) No air carrier or foreign air carrier shall make, give, or cause any undue or unreasonable preference or advantage to any particular person, port, locality, or description of traffic in air transportation in any respect whatsoever or subject any particular person, port, locality, or description of traffic in air transportation to any unjust discrimination or any undue or unreasonable prejudice or disadvantage in any respect whatsoever.