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<p>Actually, it seems he was breaking the rules as every report has stated the theater clearly had a sign prohibiting firearms on premises and according to the following:</p>
<p>[18</a> U.S. Code § 926C - Carrying of concealed firearms by qualified retired law enforcement officers | LII / Legal Information Institute](<a href=“http://www.law.cornell.edu/uscode/text/18/926C]18”>18 U.S. Code § 926C - Carrying of concealed firearms by qualified retired law enforcement officers | U.S. Code | US Law | LII / Legal Information Institute)</p>
<p>specifically this part:</p>
<p><a href=“b”>quote</a> This section shall not be construed to supersede or limit the laws of any State that—
(1) permit private persons or entities to prohibit or restrict the possession of concealed firearms on their property; or
(2) prohibit or restrict the possession of firearms on any State or local government property, installation, building, base, or park.
[/quote]
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<p>retired cops would not have been exempted from that theater’s ban on carrying of firearms as their private property rights to restrict firearms on their premises takes precedence.</p>