DPI on scoring play

[KDJBBBJ]

If an opponent of the scoring team commits a foul (other than unsportsmanlike conduct on [sic] a nonplayer foul) during a down in which a touchdown is scored and there was not a change of possession during the down, A may accept the results of the play and choose enforcement of the penalty:
a.  On the try, or
b.  On the subsequent kickoff."

Where does "there was not a change of possession during the down" come into play in the play with an interception and a facemask against the scoring team?  We have been doing it that way but as I read this it brought this question to my mind.

[bama_stripes]

If an opponent of the scoring team commits a foul (other than unsportsmanlike conduct on [sic] a nonplayer foul) during a down in which a touchdown is scored and there was not a change of possession during the down, A may accept the results of the play and choose enforcement of the penalty:
a.  On the try, or
b.  On the subsequent kickoff."

Where does "there was not a change of possession during the down" come into play in the play with an interception and a facemask against the scoring team?  We have been doing it that way but as I read this it brought this question to my mind.

You need to read further down:

"lf an opponent of the scoring team commits a foul (other than unsportsmanslike conduct or a nonplayer foul) during a down in which a touchdown is scored and there was a change of possession during the down, and such foul occurs after the change of possession, the scoring team may accept the results of the play and choose enforcement of the penalty:
a. On the try or
b. On the subsequent kickoff.

[Bob M.]

So, in general (except for unsportsmanlike and non-player fouls) there is NO situation in NFHS where

 
Defensive Penalty declined

 
Touchdown

This happens constantly. I see this all the time. I guess everyone around my area is wrong.

I've always known: Roughing the QB, personal fouls, are enforced on the try or the kickoff, but on many occasions in games, you get a play like this:

A1 drops back to pass, flag thrown on the line, pass caught by A2 who proceeds to run 30 yards for a touchdown. Coach A1 fumes that a touchdown is taken off the board, then the referee signals that the illegal hands-to-the-face is against the defense. The coach cheers, the WH signals illegal use of the hands - defense. Penalty declined. Result of the play: Touchdown. Nary a word by either team about the penalty enforcement.

I guess this is something that now that I know the rule, I'll enforce. But, it flies in the face of what I have known about the rules. Glad I've got this board to understand the rules better.

REPLY: To answer your question about situations where you might give the penalty signal, then signal declined, and then signal TD...YES there are such situations. If the TD is the result of a change of possession, and the foul by the opponent occurred PRIOR to the COP, then your signaling sequence would be correct. For example, A is illegally in motion at the snap, B intercepts and takes it to the house. A's IM foul CANNOT be penalized on the try or carried over to the kickoff. B MUST decline the penalty for the IM in order to keep the TD.