Under no circumstances are they authorized.
No. While the Air Force can be sometimes lax regarding uniform standards, they're not that lax.
I don't know about Army Aircrew wings but you are authorized to wear Navy Aircrew Wings in the Air Force, if you can manage to get them. Best bet is to check Air Force Uniform Regulations publications.
6 months after you give birth
Yes, you can wear the required Blues uniform of the U.S. Air Force IF you are in a AFJROTC program, CAP (United States Air Force Auxiliary) or in the U.S. Air Force. You may not wear this uniform under any circumstances outside of these programs or service unless required to do so or granted permission by an officer, or unless you take off all insignia that tells you rank, service, name, etc.
A WW2 B-24 gunner would most likely wear the US Army uniform as there was no official Air Force then.
When invited to a formal event where all the Active Duty Officers are wearing the Mess Dress Uniform.
You can wear them all. AFI 36-2903 (which replaced AFR 35-10) gives the order in which awards are to be displayed on the Air Force uniform--the Air National Guard wears the USAF uniform--and gives the orders of precedence for Army, Navy and Marine Corps awards displayed on the Air Force uniform.
Yes. The only unauthorized type of earring you can wear is if its "hoop" or "dangling" style. Studs and pearls are allowed.
You can go to the Army Ranger Course and recieve the tab but it is not authorized to wear on any AF uniform.
Yes, low quarters and black socks are authorized with the skirt.
Yes all military jobs you have and wear your dog tags
blues
There is no specific UCMJ Article concerned with the wear of the military uniform. If a service member is charged with improper wear of the uniform, it is likely to be a "Failure to follow direct orders" sort of situation.Each branch of the Armed Forces has its own uniform regulations. Each of these lay out recourse for violation of the reg. See below:Marine Corps - MCO P1020.34 - Marine Corps Uniform RegulationsNavy - NAVPERS 15665H - United States Navy Uniform RegulationsArmy - Army Regulation 670-1 - Wear and Appearance of Army Uniforms and InsigniaAir Force - AIR FORCE INSTRUCTION 36-2903 - Dress and Personal Appearance of Air Force PersonnelCoast Guard - COMDTINST M1020.6G - United States Coast Guard Uniform RegulationsSee each of the applicable for specifics.