Ivy League Admits Officiating Error, But Princeton Football Remains Victorious over Harvard, Sports
Go for It: The Story Behind the NFL's Fourth-Down Conversion - The Ringer
Key NFL rule changes for 2023: One date for preseason roster reductions, players other than offensive and defensive linemen can now wear the number zero, and more
NFL Replay Rules Remain Problem For Officials
NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
NFL Rulebook NFL Football Operations
NFL Replay Rules Remain Problem For Officials
NFL's instant replay officials have new powers, but owners weren't interested in other major rules changes - The Boston Globe
NFL Rulebook NFL Football Operations
2023 NFL Rule Changes include suggestions by Buffalo Bills - Buffalo Rumblings
American football rules - Wikipedia
Forward Thinking on Backward Passes