First year referee's, and I mean true first year, meaning never refereed in USSF either are assigned to only run AR positions with spots in a two man system as required in games that are not as difficult.
Referee's are rated each year and the better referees do get better assignments.
There are no real age restrictions that I know of for refereeing high school soccer.
I am an advocate of having a mandatory fitness for officials but experience officials can often times make up for diminished mobility by being in the right position and knowing what to look for.
I think a lot of times it is very easy to be a "backseat" referee meaning that you can see it in the stands with some sort of bias thinking that you could make every call. When you are down on the field being completely unbiased, with a whistle or flag in your hand things look different, just the way it is.
Also, to note the test is timed, you have an hour and a half, and there is a minimum passing grade of I believe an 80 out of 100.
