From this article http://www.kansascity.com/sports/spt-col...21581.html

"My coworker Jason Boatright pointed this out to me, so that’s why I did a quick search on Google of the NFL rulebook. It’s easy to find, and here is a link to it. http://operations.nfl.com/the-rules/2017-nfl-rulebook/

There is no mention of the national anthem in the NFL rulebook. There are no pages A62 or A63, either.

Page 62 deals with a “Foul committed during passing play,” “Foul during a backward pass or fumble,” “Foul during free kick play” and “Four during scrimmage kick play.” Page 63 continues with the scrimmage kick play, and then deals with a “Dead ball foul and foul between downs.”

Read more here: http://www.kansascity.com/sports/spt-col...rylink=cpy

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