Interesting article on this topic...
http://usmilitary.about.com/od/theor...niformwear.htm

Can it be considered 'authoritative' ?
No, the article itself s not 'authoritative', but does cite Military Regs, US Law, and a court case.

My take is that the conclusion of this article is:
1) It is clear that wearing 'distinctive parts' are certainly a NO NO (insignia, decorations etc.) ; wearing non-distinctive parts seems unclear (i.e. if wearing ANY part of a uniform was intended to be 'illegal', why differentiate and specifically cite 'distinctive parts' as illegal )?
2) A DA MAY or MAY NOT prosecute, depending on the circumstances (attempt to impersonate vs. wearing a uniform as a costume or with no 'distinctive parts')
3) Many services have regulations prohibiting the wearing of uniforms by civilians; however, paradoxically, they are not enforceable with citizens.

Some other questions :
1) Should Surplus stores/thrift stores/Ebay be allowed to sell uniforms or parts of them to civilians ...for ANY reason ?
2) Should there be a ban on the sales or profiteering of all medals/ribbons, etc. (not just some, like the Medal of Honor) ?
3) What should be done with uniforms, medals, etc. when the rightful owner (ex-military) passes on (and no family member wants them) ?
4) Does the "No Wearing of uniforms" apply to non-current issued uniforms or just current issue?
EX: Would wearing a pair of Vietnam 'tiger stripe camo' pants be considered 'Wearing a military uniform', since they are no longer issued/used? Clearly, someone wearing them would not be trying to impersonate current US Military nor would they be recognized as current Millitary. The pants would be a 'former uniform', but not a current uniform. Does ANY issued item, current of not, still constitute a uniform ?

Comment:
I'm thinking this issue, in some ways (not all ways), parallels the controversial 'burning of a US Flag'. Whether you are allowed to do it or not, by law, is a different issue than the respect that should be given to both (flags and uniforms), regardless of what the courts rule.

Please understand that my post is not arguing for or against, nor am I attacking or supporting the position of the OP....I'm just asking some questions.