Passenger means any person on an aircraft other than a flightcrew member. A passenger includes an armed security officer authorized to carry a firearm in accordance with the rule.
49 CFR § 1562.21
Scope. This subpart applies to aircraft operations into or out of Ronald Reagan Washington National Airport (DCA), fixed base operators located at DCA or gateway airports; individuals designated as a security coordinator by aircraft operators or fixed base operators; and crewmembers, passengers, and armed security officers on aircraft operations subject to this subpart.