The NFL sent out a memo saying teams can be penalized during games if someone approaches officials while not wearing an appropriate face covering.
According to NFL Network's Tom Pelissero, senior vice president of officiating administration Perry Fewell sent the memo to teams on Friday informing clubs that officials have been authorized to penalize teams for unsportsmanlike conduct.
The memo came in response to complaints from the NFL Referees Association about coaches pulling down their face coverings to yell at officials. The NFLRA disapproved of Ravens coach John Harbaugh doing so in Week 3.
"We have seen multiple occasions where head coaches have removed their masks to communicate with game officials during games.