Right Enforcement?

[GPC2]

I am glad to have found this thread, yet I leave with no more an understanding than I came here with. This rule is obviously poorly written and leads to nothing but confusion.

On Friday, I had a kid somersault into the endzone on a breakaway run. We enforced the foul on the Try, but myself and the WH had some serious discussions as to what is the proper enforcement (and whether B had an option). I actually believe(d??) that the foul should be enforced on the Try with no option for B.

After the game I went to my rule book and case book and did the ol' merry go 'round and found out NOTHING. I decided to come here and post my question and obviously this one is totally unresolved here also.

Tonight I'll be bringing this play up at our meeting and hopefully I can bring the LA interpretation to the board tomorrow.