Stuart,
When I said that it only works for head to head, I was making reference to any betting round. In other words, two players head to head pre-flop with one all-in. Both hands should be turned over before dealing begins. This of course would not be possible with multiple players facing further bets. Likewise, at the showdown in multi handed pots with a side pot or more, the order of showdown is altered. That is why I don't care for the way Rule #9 is written. If the side pots are to be decided before the pot that any all-in is contesting, why would we turn the all-in's hand over before we should? We have gone over this at great length on other threads.
I also agree with you and I will quote you: "rule 9 does need some further work done to it, I think it needs to stipulate that a player must table their cards, but I don't think I would like to add to the rule that the dealer may table the cards if the player does not as this could cause more issues with interpretation than it solves."
I'm glad you wrote it the way you did. Too many members insist that the dealer is responsible for turning over the cards, when it is clearly the responsibility of the owner of the hand. It should be handled no different than a player acting out of turn (for example), or keeping his cards in front of his chips, or not covering his cards, or splashing the pot, etc. etc.