[ConservativeMind]

That reference does not exist.

http://operations.nfl.com/media/2224/2016-nfl-rulebook.pdf

Fake news.

[Freedom56v2]

Thanks, but...

Your link is saying 2016, so maybe that is reason? Not sure where the posted reference came from.

I did not find the reference...Uncle Lonny posted it...I copied it and made my comment...

Perhaps your post should be directed to him~?

[Captain Jack Aubrey]

The requirement is in the NFL Game Operations Manual.