This was my son's attire at all interviews for ROTC, PMS, USNA, School Counselors, Professors, Nominations:
Flat Front Khakis - dry cleaned
Blue button down, long sleeve shirt - dry cleaned
Clean white t-shirt
Brown Leather Belt
Brown Suede dress shoes with confortable rubber sole for walking
Tan dress socks
He received his nomination, AROTC, NROTC, AFROTC type 1 scholarship, and, so far, admitted to the schools he visited in this outfit, including USNA. The one school he's waitlisted for, he wore a different shirt!
This outfit is currently up for sale on EBAY...
Remember that it's you, not the outfit, that will get you in. But you must show the proper respect for the situation. During the nomination interview, son was surrounded by JROTC kids in their dress unforms full of medals and ropes. He left that outfit at home and chose to dress like a normal kid (see outfit list above!).