This is warming up slowly. Just to correct a previous post, I think, the rules say 15 degrees either side of the O/B trk not 30.
The PANS OPS versus 'state' and even 'local' built procedures also make for an interesting point. Procedure design is NOT standard. The pilots of the 767 that crashed in the Far Eat whilst circling on a procedure that was draw to TERPS standards rather than PANS OPS discovered that the hard way.
We may be getting off my original thread slightly but I think my answer is going to arrive sooner or later.
Thanks for your inputs. Isn't it amazing that this subject is so unclear given that it is our bread and butter?