Legal Guarding Position on sideline

[CoachW]

Thanks for the answers.

I thought that if either foot was OOB, then it had to be a block if it was a foul, but reading the rulebook, it did not seem to say that. The link provided by Mick explains it nicely, including almost admitting it is not written very well now, and that there will be a revision in the 2004-5 book to clarify it.