So, that play is subject to a very heavy debate by umpires, as I understand it. The debate is over whether or not to alert the manager that he has a choice. Somewhere in some officials forums or internet thing, there was a very active debate, with the prevailing view being that because of the language of the rule or comment, it is up to the manager to know the rule. So the umpire enforces the catchers' interference and then needs to wait to see what the manager wants to do. Others take the view that in situations where the manager may prefer to decline. The MLB comment gives two examples -- sac fly and sac bunt.
Do you know how the ump handled in the reds pads game?