[mikesears]

Let's take a look at the reasoning behind the rule to help further our case for ready-for-play.

I believe the rulebook used to start the clock on the RFP even after a change of posession. I believe the NF changed the rule to say that it should start on the snap after a change of possesion becaues they felt A should be allowed to substitue without time running off the clock.

In this case, NEITHER team will need to substitute because the foul by B negated their own interception. A's offense will still be out there. B's defense will still be out there. Neither team will be required to do massive substitutions.

I still haven's seen you answer to my question. What actions cause a down to end? Of those, which ones cause the clock to stop?