A more updated set of rules:
archives.lib.state.ma.us/bitstream/handle/.../ocm04109606-2008-02-08.pdf?
Sorry, can't make the link work.
740 CMR: MASSACHUSETTS PORT AUTHORITY
2/8/08 (Effective 2/15/08) 740 CMR - 140
30.04: Firearms, Ammunition and Dangerous Weapons
(1) No person except federal or state law enforcement officers, United States Postal Service,
United States Customs and Border Patrol, Air Carrier employees approved by the TSA, members
of the Armed Forces of the United States and Massachusetts National Guard on official duty and
licensed armored truck service guards with the prior approval of the Authority, who are
authorized and validly licensed to carry Firearms, ammunition and explosives in Massachusetts,
shall carry loaded or otherwise operational Firearms or explosives on the Airport. All persons
shall, promptly upon entering the passenger terminal or General Aviation Terminal, as the case
may be, deliver any unloaded Firearms and ammunition, as they are carrying and licensed to
carry under Massachusetts law to the appropriate Air Carrier agent for transport in the hold of
the aircraft, in the case of commercial flights, or directly to the aircraft, in the case of general
aviation aircraft. For transport on an Air Carrier aircraft, the Firearm shall be delivered to the
agent of the Air Carrier and shall, at all times while on the Airport, be unloaded and contained
in a locked gun case; ammunition shall be stored in a separate container, all in accordance with
all applicable state and federal law. For transport on a general aviation aircraft, Firearms shall,
in all instances be unloaded and either fitted with a trigger lock that disables the trigger or
disassembled for shipment or shall be otherwise rendered unusable by removing the bolt or
otherwise disassembling the firing mechanism, as applicable. All ammunition shall be stored
in a separate box or bag.