Roger Goodell has sent a letter to all 32 teams making it clear that he wants all players to stand during the national anthem.
Goodell did not provide specifics on how he intends to ensure players follow the order. Goodell did write that it would "include such elements as an in-season platform to promote the work of our players on these core issues."
The issue will be discussed during next week's fall meetings.
"Like many of our fans," Goodell wrote, "we believe that everyone should stand for the national anthem. It is an important moment in our game. We want to honor our flag and our country, and our fans expect that of us.
"We also care deeply about our players and respect their opinions and concerns about critical social issues. The controversy over the Anthem is a barrier to having honest conversations and making real progress on the underlying issues. We need to move past this controversy, and we want to do that together with our players."
The NFL doesn't currently require players to stand during the anthem.
The proposed new policy is the result of "many of discussions with clubs and players," Goodell also wrote.