Is it legal for all police officers in the United States to carry firearms into post offices, which fall within the jurisdiction of the federal government, when called by post office employees?

  • 1
    Police don't need a contract to be able to enforce the law within their jurisdiction. This appears to be a nonsense rant, given that "first amendment auditors" is not a formal or official role, and any business can deny entry for good reason, such as safety and security threats.
    – user4657
    Feb 8, 2022 at 18:29
  • 5
    I've edited the question to concentrate on the core issue, while removing irrelevant context. Having been so edited, this is actually an interesting question - it's a good chance to explain the difference between federal proprietary, exclusive, and concurrent jurisdiction in the United States.
    – Kevin Li
    Feb 8, 2022 at 18:44
  • Thanks @L235. I found Proprietary in Black's Law Dictionary ( thelawdictionary.org/proprietary) but I don't know how it applies.
    – haleonj
    Feb 8, 2022 at 20:39
  • I would think that "when called by post office employees?" (i.e. when the USPS officials called the cops and invited them onto the premises) would be quite distinct from a case where an officer enters a post office uninvited simply to pick up mail or post a letter. It seems like an odd fact pattern, among those that are possible to focus on.
    – ohwilleke
    Feb 10, 2022 at 8:10
  • 1
    @ohwilleke, the odd fact pattern was originally discussed in the question but earned downvotes.
    – haleonj
    Feb 10, 2022 at 20:34

1 Answer 1


39 CFR § 232.1(l) provides that:

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.

Police officers on active duty, enforcing the law at the request of post office employees, appear to be discharging "official purposes".


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