49 CFR § 1544.219 - Carriage of accessible weapons.
(a) Flights for which screening is conducted. The provisions of § 1544.201(d), with respect to accessible weapons, do not apply to a law enforcement officer (LEO) aboard a flight for which screening is required if the requirements of this section are met. Paragraph (a) of this section does not apply to a Federal Air Marshal on duty status under § 1544.223.
(1) Unless otherwise authorized by TSA, the armed LEO must meet the following requirements:
(i) Be a Federal law enforcement officer or a full-time municipal, county, or state law enforcement officer who is a direct employee of a government agency.
(ii) Be sworn and commissioned to enforce criminal statutes or immigration statutes.
(iii) Be authorized by the employing agency to have the weapon in connection with assigned duties.
(iv) Has completed the training program “Law Enforcement Officers Flying Armed.”
(2) In addition to the requirements of paragraph (a)(1) of this section, the armed LEO must have a need to have the weapon accessible from the time he or she would otherwise check the weapon until the time it would be claimed after deplaning. The need to have the weapon accessible must be determined by the employing agency, department, or service and be based on one of the following:
(i) The provision of protective duty, for instance, assigned to a principal or advance team, or on travel required to be prepared to engage in a protective function.
(ii) The conduct of a hazardous surveillance operation.
(iii) On official travel required to report to another location, armed and prepared for duty.
(iv) Employed as a Federal LEO, whether or not on official travel, and armed in accordance with an agency-wide policy governing that type of travel established by the employing agency by directive or policy statement.
(v) Control of a prisoner, in accordance with § 1544.221, or an armed LEO on a round trip ticket returning from escorting, or traveling to pick up, a prisoner.
(vi) TSA Federal Air Marshal on duty status.
(3) The armed LEO must comply with the following notification requirements:
(i) All armed LEOs must notify the aircraft operator of the flight(s) on which he or she needs to have the weapon accessible at least 1 hour, or in an emergency as soon as practicable, before departure.
(ii) Identify himself or herself to the aircraft operator by presenting credentials that include a clear full-face picture, the signature of the armed LEO, and the signature of the authorizing official of the agency, service, or department or the official seal of the agency, service, or department. A badge, shield, or similar device may not be used, or accepted, as the sole means of identification.
(iii) If the armed LEO is a State, county, or municipal law enforcement officer, he or she must present an original letter of authority, signed by an authorizing official from his or her employing agency, service or department, confirming the need to travel armed and detailing the itinerary of the travel while armed.
(4) The aircraft operator must do the following:
(i) Obtain information or documentation required in paragraphs (a)(3)(ii), (iii), and (iv) of this section.
(ii) Advise the armed LEO, before boarding, of the aircraft operator's procedures for carrying out this section.
(iv) Ensure that the identity of the armed LEO is known to the appropriate personnel who are responsible for security during the boarding of the aircraft.
(v) Notify the pilot in command and other appropriate crewmembers, of the location of each armed LEO aboard the aircraft. Notify any other armed LEO of the location of each armed LEO, including FAM's. Under circumstances described in the security program, the aircraft operator must not close the doors until the notification is complete.
(vi) Ensure that the information required in paragraphs (a)(3)(i) and (ii) of this section is furnished to the flight crew of each additional connecting flight by the Ground Security Coordinator or other designated agent at each location.
(b) Flights for which screening is not conducted. The provisions of § 1544.201(d), with respect to accessible weapons, do not apply to a LEO aboard a flight for which screening is not required if the requirements of paragraphs (a)(1), (3), and (4) of this section are met.
(1) No aircraft operator may serve any alcoholic beverage to an armed LEO.
(2) No armed LEO may:
(i) Consume any alcoholic beverage while aboard an aircraft operated by an aircraft operator.
(ii) Board an aircraft armed if they have consumed an alcoholic beverage within the previous 8 hours.
(d) Location of weapon.
(1) Any individual traveling aboard an aircraft while armed must at all times keep their weapon:
(i) Concealed and out of view, either on their person or in immediate reach, if the armed LEO is not in uniform.
(ii) On their person, if the armed LEO is in uniform.
(2) No individual may place a weapon in an overhead storage bin.
The following state regulations pages link to this page.