Hello Mike,
I'm looking back at some of the earlier posts. I'll send this out for now: The current rule seems to apply only after a legal size bet has been made, otherwise no raise is possible? A player that checks in turn; can re-enter the betting round if another player opens that round, and will have every option open to them, including a raise.
A brief explanation at the end of the rule would be enough. Any player, who has acted by checking in turn, is allowed to re-enter that round of betting with all options open to them.
I'm trying to say that; the current rule does not apply to any player that has checked in turn prior to the bet and short all-in that followed. Whew!
The rule could actually apply to all games, limit included, if we changed some wording. Example: An all-in raise must qualify as the required legal amount, in order to reopen betting.
NO-LIMIT & POT LIMIT
Any Player that has checked on his turn to act, is allowed to raise if a subsequent player makes a legal bet. A legal bet must fulfill the minimum requirement, which is at least the size of the big blind.