MIL-DTL-28920 Revision C, July 23, 1997
TROUSERS, MEN'S - DRESS (OFFICER'S)
The trousers are intended for wear by officers of the U.S. Marine Corps as follows:
Type I - Dress wear for general officers. Type II - Full dress wear for U.S. Marine Band leader and assistant leader. Type III - Dress wear for officers other than general officers.