chrisd
Major Champion
I see where you're coming from but this isn't a prior agreement to waive the rules, it's one player deciding to overlook a breach by his opponent.
I've just found the reference on the RandA site, it's Note 1 in Rule 2-5 as below:
"Note 1: A player may disregard a breach of the Rules by his opponent provided there is no agreement by the sides to waive a Rule (Rule 1-3). "
It does make sense, your in a match play and your opponent breaks a rule, you are going to win the hole anyway and you see an obscure rule broken - why pull him on it and risk a row!
A few weeks ago in. 4bbb match one of our opponents took down half a tree with practise swings he was pretty much out of the hole, why would we call a penalty?