There were 19 proposed NFL rule changes for the 2016 season. The league announced that nine of those nineteen proposals were adopted by the NFL for the upcoming year. One of the nineteen rules that was proposed was done so by the Buffalo Bills.
The rule that the Bills proposed was an amendment to Rule 15, Section 2, Articles 1, 4, and 5 (otherwise known as Instant Replay). The intent of this proposal is to increase the instances in which a coach can use instant replay to challenge a play. This would have been a good rule but it was not adopted by the league.