49 U.S.C. § 41507

1. (a)When the Secretary of Transportation decides that a price charged or received by an air carrier or foreign air carrier for foreign air transportation, or a classification, rule, or practice affecting that price or the value of the transportation provided under that price, is or will be unreasonably discriminatory, the Secretary may—
   1. (1)change the price, classification, rule, or practice as necessary to correct the discrimination; and
   2. (2)order the air carrier or foreign air carrier to stop charging or collecting the discriminatory price or carrying out the discriminatory classification, rule, or practice.
2. (b)The Secretary may act under this section on the Secretary’s own initiative or on a complaint filed with the Secretary and only after notice and an opportunity for a hearing.