[MJT]

Originally Posted by Blue37

Does the NFL have an equivalent to the NFHS rule?

Rule 3 Periods, Time Factors and Substitutions
SECTION 1 LENGTH OF PERIODS
ART. 3 A period or periods may be shortened in any emergency by agreement of the opposing coaches and the referee. By mutual agreement of the opposing coaches and the referee, any remaining period may be shortened at any time or the game terminated.

In a Fed game, if I see the coaches heading for mid-field to shake hands, I accept that as their agreement to terminate the game. My agreement is demonstrated by leaving the field.

I do not see that as an NFL rule in the official NFL rule book that I have.