This subchapter and this part apply to persons engaged in aviation-related activities.

(a) Where the Administrator is named in this subchapter as exercising authority over a function, the authority is exercised by the Administrator or the Deputy Administrator, or any individual formally designated to act as the Administrator or the Deputy Administrator.

(b) Where TSA or the designated official is named in this subchapter as exercising authority over a function, the authority is exercised by the official designated by the Administrator to perform that function.

In addition to the terms in part 1500 of this chapter, the following terms are used in this subchapter:

Air operations area (AOA) means a portion of an airport, specified in the airport security program, in which security measures specified in this part are carried out. This area includes aircraft movement areas, aircraft parking areas, loading ramps, and safety areas, for use by aircraft regulated under 49 CFR part 1544 or 1546, and any adjacent areas (such as general aviation areas) that are not separated by adequate security systems, measures, or procedures. This area does not include the secured area.

Aircraft operator means a person who uses, causes to be used, or authorizes to be used an aircraft, with or without the right of legal control (as owner, lessee, or otherwise), for the purpose of air navigation including the piloting of aircraft, or on any part of the surface of an airport. In specific parts or sections of this subchapter, “aircraft operator” is used to refer to specific types of operators as described in those parts or sections.

Airport operator means a person that operates an airport serving an aircraft operator or a foreign air carrier required to have a security program under part 1544 or 1546 of this chapter.

Airport security program means a security program approved by TSA under § 1542.101 of this chapter.

Airport tenant means any person, other than an aircraft operator or foreign air carrier that has a security program under part 1544 or 1546 of this chapter, that has an agreement with the airport operator to conduct business on airport property.

Airport tenant security program means the agreement between the airport operator and an airport tenant that specifies the measures by which the tenant will perform security functions, and approved by TSA, under § 1542.113 of this chapter.

Approved, unless used with reference to another person, means approved by TSA.

Cargo means property tendered for air transportation accounted for on an air waybill. All accompanied commercial courier consignments, whether or not accounted for on an air waybill, are also classified as cargo. Aircraft operator security programs further define the term “cargo.”

Certified cargo screening facility (CCSF) means a facility certified by TSA to screen air cargo in accordance with part 1549. As used in this subchapter, “certified cargo screening facility” refers to the legal entity that operates a CCSF at a particular location.

Certified cargo screening program (CCSP) means the program under which facilities are authorized to screen cargo to be offered for transport on certain passenger aircraft in accordance with 49 CFR part 1549.

Checked baggage means property tendered by or on behalf of a passenger and accepted by an aircraft operator for transport, which is inaccessible to passengers during flight. Accompanied commercial courier consignments are not classified as checked baggage.

Escort means to accompany or monitor the activities of an individual who does not have unescorted access authority into or within a secured area or SIDA.

Exclusive area means any portion of a secured area, AOA, or SIDA, including individual access points, for which an aircraft operator or foreign air carrier that has a security program under part 1544 or 1546 of this chapter has assumed responsibility under § 1542.111 of this chapter.

Exclusive area agreement means an agreement between the airport operator and an aircraft operator or a foreign air carrier that has a security program under parts 1544 or 1546 of this chapter that permits such an aircraft operator or foreign air carrier to assume responsibility for specified security measures in accordance with § 1542.111 of this chapter.

FAA means the Federal Aviation Administration.

Flightcrew member means a pilot, flight engineer, or flight navigator assigned to duty in an aircraft during flight time.

Indirect air carrier (IAC) means any person or entity within the United States not in possession of an FAA air carrier operating certificate, that undertakes to engage indirectly in air transportation of property, and uses for all or any part of such transportation the services of an air carrier. This does not include the United States Postal Service (USPS) or its representative while acting on the behalf of the USPS.

Loaded firearm means a firearm that has a live round of ammunition, or any component thereof, in the chamber or cylinder or in a magazine inserted in the firearm.

Passenger seating configuration means the total maximum number of seats for which the aircraft is type certificated that can be made available for passenger use aboard a flight, regardless of the number of seats actually installed, and includes that seat in certain aircraft that may be used by a representative of the FAA to conduct flight checks but is available for revenue purposes on other occasions.

Private charter means any aircraft operator flight—

(1) For which the charterer engages the total passenger capacity of the aircraft for the carriage of passengers; the passengers are invited by the charterer; the cost of the flight is borne entirely by the charterer and not directly or indirectly by any individual passenger; and the flight is not advertised to the public, in any way, to solicit passengers.

(2) For which the total passenger capacity of the aircraft is used for the purpose of civilian or military air movement conducted under contract with the Government of the United States or the government of a foreign country.

Public charter means any charter flight that is not a private charter.

Scheduled passenger operation means an air transportation operation (a flight) from identified air terminals at a set time, which is held out to the public and announced by timetable or schedule, published in a newspaper, magazine, or other advertising medium.

Screening function means the inspection of individuals and property for weapons, explosives, and incendiaries.

Screening location means each site at which individuals or property are inspected for the presence of weapons, explosives, or incendiaries.

Secured area means a portion of an airport, specified in the airport security program, in which certain security measures specified in part 1542 of this chapter are carried out. This area is where aircraft operators and foreign air carriers that have a security program under part 1544 or 1546 of this chapter enplane and deplane passengers and sort and load baggage and any adjacent areas that are not separated by adequate security measures.

Security Identification Display Area (SIDA) means a portion of an airport, specified in the airport security program, in which security measures specified in this part are carried out. This area includes the secured area and may include other areas of the airport.

Standard security program means a security program issued by TSA that serves as a baseline for a particular type of operator. If TSA has issued a standard security program for a particular type of operator, unless otherwise authorized by TSA, each operator's security program consists of the standard security program together with any amendments and alternative procedures approved or accepted by TSA.

Sterile area means a portion of an airport defined in the airport security program that provides passengers access to boarding aircraft and to which the access generally is controlled by TSA, or by an aircraft operator under part 1544 of this chapter or a foreign air carrier under part 1546 of this chapter, through the screening of persons and property.

Unescorted access authority means the authority granted by an airport operator, an aircraft operator, foreign air carrier, or airport tenant under part 1542, 1544, or 1546 of this chapter, to individuals to gain entry to, and be present without an escort in, secured areas and SIDA's of airports.

Unescorted access to cargo means the authority granted by an aircraft operator or IAC to individuals to have access to air cargo without an escort.

Any provision of this subchapter held to be invalid or unenforceable as applied to any person or circumstance shall be construed so as to continue to give the maximum effect to the provision permitted by law, including as applied to persons not similarly situated or to dissimilar circumstances, unless such holding is that the provision of this subpart is invalid and unenforceable in all circumstances, in which event the provision shall be severable from the remainder of this subchapter and shall not affect the remainder thereof.