Halo

All I read is "...field and bench area should stand at attention"
and "Failure to be on the field by the start of the National Anthem may result in discipline"

Words like "should" and "may" are compulsory terms. Meaning they are essential, yet they are NOT mandatory.

So it's up to teams and NFL to enforce fines and penalties, but Roger Goodell and the NFL owners have made it very clear they will not enforce desecration of the flag by employees of the NFL.

Yet those who tried to honor the victims up 9/11 by wearing special socks, shoes, etc. were threatened with heavy fines.

Consider Bounty Gate, for example, among so many other rules and regulations the NFL has invented in recent times. How many of those rules are EVER enforced with regularity or in fairness???

Bountygate itself is an example of the NFL ONLY enforcing rules where it can gain PR that boost it's case to make settlement with NFL players union and retired players to show it wants to help football player targeting injuries.