When does the clock stop for OOB?

[Dommer1]

I think this should be clear:

When the runner goes out of bounds, the clock stops. The clock is restarted when the ball is spotted, except inside the 2 minute warning in the 2nd qtr or inside the last 5 minutes of the 4th qtr. In those cases, the clock starts on the snap.

The play clock (40-second clock) starts when the ball becomes dead.