This subject has been discussed for as long as I've been a TDA member. At the 2011 Summit, "Substantial Action" was debated and the final (current) TDA rule was not adopted until Version 2.0 was released, a couple months after the Summit. Substantial action applies to so many different situations that it would be time consuming to list them all. Out of turn, skipped players, action taken on incorrect board cards, etc., etc,.
What we do know, by definition...is that it requires action from at least two players, i.e. bet-call, bet-fold, bet-raise, check-bet, or any action from three player's. I have always believed that "Substantial Action" could never apply in head to head situations...that is, unless we consider the dealer as one of those persons.
I propose that the actions of the dealer be considered as an aggressive player in the following situations: Whenever a player is skipped, the dealer's "tap and burn" is the same as a player... betting or calling.
There is much more to discuss but I will leave that for further debate. This should be enough to get us started.
http://www.pokertda.com/forum/index.php?topic=947.0http://www.pokertda.com/forum/index.php?topic=169.0http://www.pokertda.com/forum/index.php?topic=150.0