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Before you complain about the officials this season, you’ll want to make sure you actually know the rules. Fortunately, the NFL has published the entire 217-page rule book online.

The whole rule book is available as a PDF here.

The most noteworthy part of the rule book, which is on Page 2, where it identifies the changes to the rules this year. Those include:

1. It is now a delay of game penalty if a team is erroneously granted a timeout.

2. The offensive and defensive play callers can use the coach-to-helmet communications system regardless of whether the coach is in the booth or on the sideline.

3. There is no longer a five-yard penalty for illegally touching a pass after being out of bounds and then re-establishing inbounds, but it is a loss of down.

4. The line of scrimmage for extra point kicks is permanently the 15-yard line.

5. Touchbacks on kickoffs are now moved to the 25-yard line.

6. All chop blocks are illegal.

7. The horse-collar tackle rule now includes a defender grabbing the jersey at the name plate or above.

8. A player who gets two fouls for certain kinds of unsportsmanlike conduct is automatically ejected.

9. Multiple spots of enforcement for a double foul after a change of possession have been eliminated.