SCHOOL and TALENT
A Marine or Sailor can wear the french fourragere as long as he is in the 5th or 6th Marine regiment. Once he leaves, he can no longer wear it.
No, you are no longer authorized to wear the Marine uniform. You have to be retired or discharged on disability to continue to wear the uniform. And you are not in the Marine reserved because you are in another service.
a marine bioligist has to wear clothes that are water protective
right
a wet suit
Yes.
a tux
Yes, on the Marine Dress Blue "B" uniform.
No, I believe it is the Marine's.
No. As per Marine Corps Order: P1020.34F. http://www.marcorsyscom.usmc.mil/sites/mcub/library/MCUR/URTOC.htm
Marines that earned the right to wear it through dedication and hard work.