It was years ago I done it, and only done a little work on ropes after it.
The thing is they expect you to work with a Level 1 for years after you get your Level 3; they supply the Level 1 at high cost.
If they clean window though they don't bother using a Level 1, the thing is they don't get questioned as they are IRATA, and you will get questioned because your not. Its a big con, I tried to question it once on their message board and they just shut the board down.
Peter