Propper attire and free throw administration

[JStinski82]

Right now I have slacks with belt loops and the v-neck on my striped shirt goes down a little bit farther down than standard, would this be ok to do a junior high level game, black shoes and black socks of course.

What is the procedure when, say, the umpire calls a foul involving free throws, where does the umpire go, where does the ref go?

Thanks