MassPort Firearms regulations (Logan-Hanscom-Worcester)
you have to dig pretty deep - but here it is - emphasis added -
Note that the airlines (American Airlines' policy below is used as an example) do not require ammunition to be carried separately - hence it appears that MassPort came up with that on their own...
CODE OF MASSACHUSETTS REGULATIONS
TITLE 740: MASSACHUSETTS PORT AUTHORITY
CHAPTER 30.00: AIRPORT SECURITY
Current through September 4, 2009, Register #1138
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 dis-ables 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.
(2) No person, except federal or state law enforce-ment officers, U.S. Postal Service, United States Customs and Border Patrol officers, members of the Armed Forces of the United States and Massachusetts National Guard on official duty, or other Persons authorized by the Authority or TSA, shall possess either on the individual's person or in her accessible Property within a Sterile Area of an Airport, any item or material prohibited by federal transportation secu-rity regulations (including but not limited to 49 CFR Part 1540, 49 CFR Part 1542) or any TSA regulation, standard, order, directive or other published guidance from being carried onto an Aircraft in commercial service.
<General Materials (GM) - References, Annotations, or Tables>
Mass. Regs. Code tit. 740, § 30.04, 740 MA ADC 30.04
740 MA ADC 30.04
END OF DOCUMENT
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American Airlines Policy (Example)
Transporting Firearms And Ammunition
Note: American Airlines does not accept firearms in checked baggage to/from the United Kingdom (except for military/government personnel with proper documentation).
The information shown below pertains to travel within the United States only (unless stated otherwise). For information on the transportation of firearms and ammunition to international destinations, please contact Reservations.
General Information
* Firearms and ammunition are accepted as checked baggage only.
* Firearms will only be accepted if unloaded and in a locked, hard-sided container only (for example - rifle case. TSA approved locks are now accepted).
* Ammunition in its original packaging from the manufacturer is preferred, however it will be accepted in fiber, wood or metal boxes, or other packaging specifically designed to carry small amounts of ammunition. Loose ammunition or clips will not be accepted.
* Firearms may not be checked curbside.
* No one under 18 years of age may check a firearm.
* Pellet and BB guns are not considered firearms, and therefore, do not require any special handling or documentation.
Allowance
* Maximum per case is three rifles/shotguns or five pistols/revolvers, ammunition, shooting mat, noise suppressors, and tools. There is no limit on the amount of cases allowed.
* Ammunition is limited to 11 lbs./5 kgs. per passenger.
* Charges may apply based on the number of checked bags in addition to oversize/overweight charges. Visit the Baggage Allowance page for more information.