Walk-ons are allowed but....it has to be handled on a personal level. You talk to someone about FSO, they come try it out, and if you have room put a uniform on them. I have invited folks and had to ask other CO's to pick them up because I am full. They have gladly done so (thank you again AK's, Jolly Rogers, and several others). It is a personal contact that makes the walk-ons succeed.