nobodyhome, thanks for the info. If I recall, the last time I used it I went as a walk in. I think it has to do with the availabity of what it is you want to watch. If, for exampel, there is an open spot, but you want to watch something that someone else is watching, then they might have you wait. If you want to watch something that isn't being watched and there is an open spot then they usually let you sit and watch the archive of your choosing.
Plum, I am not sure if the reasons that you listed are reasons why they put the restrictions in place. I mean, I guess I could see them working if your going to do the show on Broadway or something like that. But, as nobodyhome had said, if your going to be doing the show, like at a a college (where I am doing Footloose) or a school in general then that would be okay. I guess that if I were to be student directing it, then there is a chance that I could be stealing the blocking from what I was watching on the archvie. Granted, I am playing one of Ren's friends and spending most of the time in the ensemble so I don't think that that is going to play a factor. But, I guess a student director or even an adult who is directing a college production could potentially do what you just talked about.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll