No, although it might be overlooked in a field environment.
Yes.
On social occasions when the prescribed uniform is the Army Blue Uniform, personnel who don't have one are authorized to wear the Army Green Uniform with white shirt and bow tie.
No the CIB is a an Army award and not transferrable to the Marine Core dress uniform.
Usually, his dress-up Army uniform.
Yes.
Absolutly!
they cool comtomble
The same as you would wear any other awarded ribbon on the Army dress uniform. I have attached a link to this question to further assist you.
The combat action badge are worn with "Class A" Army green, blue or white uniform coats. You must wear that uniform when wearing the badge.
Michael Jackson
On the left side of your dress uniform for the Army. Usually below the other badges if you have room. Navy, Marines, Airforce will wear ribbons of the left side of the dress uniform. Ferguson
Yes, you are allowed to wear awards from other U.S. military services on your Navy Uniform.