I lived in Utah for six years. The state's firearms preemption law is, in my opinion, one of the strongest in the US. You can read it at:
[url]www.livepublish.le.state.ut.us/lpBin20/lpext.dll/InfobaseUtahCode/10d54/1148c/114e5?fn=document-frame.htm&f=templates&2.0[/url]
The text is here:
76-10-500. Uniform law.
1) The individual right to keep and bear arms being a constitutionally protected right, the Legislature finds the need to provide uniform laws throughout the state. Except as specifically provided by state law, a citizen of the United States or a lawfully admitted alien shall not be:
(a) prohibited from owning, possessing, purchasing, selling, transferring, transporting, or keeping any firearm at his place of residence, property, business, or in any vehicle lawfully in his possession or lawfully under his control; or
(b) required to have a permit or license to purchase, own, possess, transport, or keep a firearm.
(2) This part is uniformly applicable throughout this state and in all its political subdivisions and municipalities. All authority to regulate firearms shall be reserved to the state except where the Legislature specifically delegates responsibility to local authorities or state entities. [b]Unless specifically authorized by the Legislature by statute, a local authority or state entity may not enact or enforce any ordinance, regulation, or rule pertaining to firearms.[/b]
I added the emphasis to the last line.
The letter of the law is quite clear, especially in the last sentence.
While you can argue that the "intent" of the law is to prevent localities from imposing "more" restrictions on individuals, that is a trick that the anti's usually play on us. We should not resort to it. The plain letter of the law should be its binding meaning, not what people with agendas can read into it.
Having said that, there may well be another section of the state code that "specifically authorizes" cities to maintain local citizen militias and posses, and to provide for the same. If there isn't such a section, the city is out of luck.
[Edited to fix the link]