Every post office I have seen is posted with the 18 USC 930 sign, as is every federal building I've ever been to and I go to quite a few in DC and other States. Another fun fact is that the law doesn't cover parking lots
Now tell me what criminal law you will be charged with under the CFR and what the penalty is. There is a generic federal infraction for the violating the reg you cited, as for illegally posting handbills. It is essentially the same as getting a speeding ticket in a national park. However if you enter the building and they are posted as most are, you will get charged with 18 USC 930 which is a federal misdemeanor(4) Voter registration. Voter registration may be conducted on postal premises only with the approval of the postmaster or installation head provided that all of the following conditions are met:
(i) The registration must be conducted by government agencies or nonprofit civic leagues or organizations that operate for the promotion of social welfare but do not participate or intervene in any political campaign on behalf of any candidate or political party for any public office.
(ii) Absolutely no partisan or political literature may be available, displayed, or distributed. This includes photographs, cartoons, and other likenesses of elected officials and candidates for public office.
(iii) The registration is permitted only in those areas of the postal premises regularly open to the public.
(iv) The registration must not interfere with the conduct of postal business, postal customers, or postal operations.
(v) The organization conducting the voter registration must provide and be responsible for any equipment and supplies.
(vi) Contributions may not be solicited.
(vii) Access to the workroom floor is prohibited.
(viii) The registration activities are limited to an appropriate period before an election.
(5) Except as part of postal activities or activities associated with those permitted under paragraph (h)(4) of this section, no tables, chairs, freestanding signs or posters, structures, or furniture of any type may be placed in postal lobbies or on postal walkways, steps, plazas, lawns or landscaped areas, driveways, parking lots, or other exterior spaces.
(i) Photographs for news, advertising, or commercial purposes. Except as prohibited by official signs or the directions of security force personnel or other authorized personnel, or a Federal court order or rule, photographs for news purposes may be taken in entrances, lobbies, foyers, corridors, or auditoriums when used for public meetings. Other photographs may be taken only with the permission of the local postmaster or installation head.
(j) Dogs and other animals. Dogs and other animals, except those used to assist persons with disabilities, must not be brought upon postal property for other than official purposes.
(k) Vehicular and pedestrian traffic.
(1) Drivers of all vehicles in or on property shall be in possession of a current and valid state or territory issued driver's license and vehicle registration, and the vehicle shall display all current and valid tags and licenses required by the jurisdiction in which it is registered.
(2) Drivers who have had their privilege or license to drive suspended or revoked by any state or territory shall not drive any vehicle in or on property during such period of suspension or revocation.
(3) Drivers of all vehicles in or on property shall drive in a careful and safe manner at all times and shall comply with the signals and directions of security force personnel, other authorized individuals, and all posted traffic signs.
(4) The blocking of entrances, driveways, walks, loading platforms, or fire hydrants in or on property is prohibited.
(5) Parking without authority, parking in unauthorized locations or in locations reserved for other persons, or continuously in excess of 18 hours without permission, or contrary to the direction of posted signs is prohibited. This section may be supplemented by the postmaster or installation head from time to time by the issuance and posting of specific traffic directives as may be required. When so issued and posted such directives shall have the same force and effect as if made a part hereof.
(l) Weapons and explosives. Notwithstanding the provisions of any other law, rule or regulation, no person while on postal property may carry firearms, other dangerous or deadly weapons, or explosives, either openly or concealed, or store the same on postal property, except for official purposes.
(m) Nondiscrimination. There must be no discrimination by segregation or otherwise against any person or persons because of race, color, religion, national origin, sex, or disability, in furnishing, or by refusing to furnish to such person or persons the use of any facility of a public nature, including all services, privileges, accommodations, and activities provided on postal property.
(n) Conduct with regard to meetings of the Board of Governors.
(1) Without the permission of the chairman no person may participate in, film, televise, or broadcast any portion of any meeting of the Board or any subdivision or committee of the Board. Any person may electronically record or photograph a meeting, as long as that action does not tend to impede or disturb the members of the Board in the performance of their duties, or members of the public while attempting to attend or observe a meeting.
(2) Disorderly conduct, or conduct which creates loud or unusual noise, obstructs the ordinary use of entrances, foyers, corridors, offices, meeting rooms, elevators, stairways, or parking lots, or otherwise tends to impede or disturb the members of the Board in the performance of their duties, or members of the public while attempting to attend or observe a meeting of the Board or of any subdivision, or committee of the Board, is prohibited.
(3) Any person who violates paragraph (n) (1) or (2) of this section may, in addition to being subject to the penalties prescribed in paragraph (p) of this section, be removed from and barred from reentering postal property during the meeting with respect to which the violation occurred.
(4) A copy of the rules of this section governing conduct on postal property, including the rules of this paragraph appropriately highlighted, shall be posted in prominent locations at the public entrances to postal property and outside the meeting room at any meeting of the Board of Governors or of any subdivision or committee of the Board.
(o) Depositing literature. Depositing or posting handbills, flyers, pamphlets, signs, poster, placards, or other literature, except official postal and other Governmental notices and announcements, on the grounds, walks, driveways, parking and maneuvering areas, exteriors of buildings and other structures, or on the floors, walls, stairs, racks, counters, desks, writing tables, window-ledges, or furnishings in interior public areas on postal premises, is prohibited. This prohibition does not apply to:
(1) Posting notices on bulletin boards as authorized in § 243.2(a) of this chapter;
(2) Interior space assigned to tenants for their exclusive use;
(3) Posting of notices by U.S. Government-related organizations, such as the Inaugural Committee as defined in 36 U.S.C. 501.
(p) Penalties and other law.
(1) Alleged violations of these rules and regulations are heard, and the penalties prescribed herein are imposed, either in a Federal district court or by a Federal magistrate in accordance with applicable court rules. Questions regarding such rules should be directed to the regional counsel for the region involved.
(2) Whoever shall be found guilty of violating the rules and regulations in this section while on property under the charge and control of the Postal Service is subject to a fine as provided in 18 U.S.C. 3571 or imprisonment of not more than 30 days, or both. Nothing contained in these rules and regulations shall be construed to abrogate any other Federal laws or regulations or any State and local laws and regulations applicable to any area in which the property is situated.
(1) Members of the U.S. Postal Service security force shall exercise the powers provided by 18 U.S.C. 3061(c)(2) and shall be responsible for enforcing the regulations in this section in a manner that will protect Postal Service property and persons thereon.
(2) Local postmasters and installation heads may, pursuant to 40 U.S.C. 1315(d)(3) and with the approval of the chief postal inspector or his designee, enter into agreements with State and local enforcement agencies to insure that these rules and regulations are enforced in a manner that will protect Postal Service property.
(3) Postal Inspectors, Office of Inspector General Criminal Investigators, and other persons designated by the Chief Postal Inspector may likewise enforce regulations in this section.
[37 FR 24346, Nov. 16, 1972]
In a post office, YES!
Your LTC, or even Constitutional Carry, doesn't carry over to Post Office property!
US Post Offices are completely off limits per 39 C.F.R. § 232.1(l):
Weapons and explosives. Notwithstanding the provisions of any other law, rule or regulation, no person while on postal property may carry firearms, other dangerous or deadly weapons, or explosives, either openly or concealed, or store the same on postal property, except for official purposes.
They do not need signs. You legally can't even be armed in the parking lot.
Note other Federal property is different, as it is covered under 18 U.S. Code §930 - Possession of firearms and dangerous weapons in Federal facilities...
(a) Except as provided in subsection (d), whoever knowingly possesses or causes to be present a firearm or other dangerous weapon in a Federal facility (other than a Federal court facility), or attempts to do so, shall be fined under this title or imprisoned not more than 1 year, or both.
(b) Whoever, with intent that a firearm or other dangerous weapon be used in the commission of a crime, knowingly possesses or causes to be present such firearm or dangerous weapon in a Federal facility, or attempts to do so, shall be fined under this title or imprisoned not more than 5 years, or both.
(c) A person who kills any person in the course of a violation of subsection (a) or (b), or in the course of an attack on a Federal facility involving the use of a firearm or other dangerous weapon, or attempts or conspires to do such an act, shall be punished as provided in sections 1111, 1112, 1113, and 1117.
(d) Subsection (a) shall not apply to—
(1) the lawful performance of official duties by an officer, agent, or employee of the United States, a State, or a political subdivision thereof, who is authorized by law to engage in or supervise the prevention, detection, investigation, or prosecution of any violation of law;
(2) the possession of a firearm or other dangerous weapon by a Federal official or a member of the Armed Forces if such possession is authorized by law; or
(3) the lawful carrying of firearms or other dangerous weapons in a Federal facility incident to hunting or other lawful purposes.
(e) (1) Except as provided in paragraph (2), whoever knowingly possesses or causes to be present a firearm or other dangerous weapon in a Federal court facility, or attempts to do so, shall be fined under this title, imprisoned not more than 2 years, or both.
(2) Paragraph (1) shall not apply to conduct which is described in paragraph (1) or (2) of subsection (d).
(f) Nothing in this section limits the power of a court of the United States to punish for contempt or to promulgate rules or orders regulating, restricting, or prohibiting the possession of weapons within any building housing such court or any of its proceedings, or upon any grounds appurtenant to such building.
Note the highlighted section, 18 USC §930 applies to facilities, defined as "a building or part thereof owned or leased by the Federal Government, where Federal employees are regularly present for the purpose of performing their official duties" whereas 39 C.F.R. § 232.1(l) applies to "property," which is the entire location to include the parking lot!
Good discussion all around. Has anyone come across a story of anyone being busted for carrying where the should not. The only ones I hear about is TSA finding someone's gun in bag during x-ray carry on. (Close call by me when I almost put the bag on the belt and then remembered and took it off)I have this recurring nightmare of standing in line in the post office and forgetting that I am armed -- and then having someone spot my "Bulldog bulge" and sound an alarm. Anyone else have this one?