I was working on a RM yesterday in iTest team. It was not until I had done all my work and went to save the RM that iTest told me that I didn't have the license to work on RMs! Now, I have to say, the way iTest handles that--as long as you have an Enterprise license available--is pretty slick: You just go into licensing, it picks Enterprise, you click OK, and then you can save the RM.
But what if you don't have an Enterprise license handy? You've potentially spent hours on something that you can't save!
My suggestion is that, when you begin working on an RM, and don't have Enterprise, that iTest warn you right away. Sort of like how an editor warns you that you're opening a file read only.