15yd facemask foul by K on scrimmage kick.
 

Had this in our game Friday and I think we messed up the enforcement of this penalty.

K 4-7 @ K40 lines up in scrimmage(punt) kick formation. Ball snapped and kicked w/o any problems after kick K67 and R35 are engaged @ the 50. K67's hand gets up on R35's facemask and twists. Flag thrown for 15yd facemask. R23 receives kick @ the R 15(after foul by K67) and returns it to the R20.

We enforced this from the end of the run but believe that to be incorrect and we should have enforced it from the previous spot and replayed the down.

Please let me know what you think is correct and give any case book or rule references if you have them.

Thanks for the help.

Did the penalty happen during the kick or after the ball was possessed by R?

Peace

During the kick, before R possessed the ball.

Then you're right: since it's a foul by K during a loose ball play, the basic spot should have been the previous spot. And if R elected to accept the penalty, the down should have been replayed.

If the kick had ended (by R gaining possession) prior to the facemask foul, then the basic spot would have been the end of the run. In that case, the enforcement you actually used would have been correct.

Canadian Ruling
 

CANADIAN RULING: The FM was between the kick and the catch, so 15 yards from the end of the run.