49 CFR §1510.5

1. (a)Each direct air carrier and foreign air carrier described in § 1510.9(a) shall impose a security service fee of $5.60 per one-way trip for air transportation originating at an airport in the United States. Passengers may not be charged more than $5.60 per one-way trip or $11.20 per round trip.
2. (b)The security service fee must be imposed on passengers who obtained the ticket for air transportation with a frequent flyer award, but may not be imposed on any other nonrevenue passengers.