New York, New York - A new NFL policy on the handling of concussions is expected to go into effect as soon as possible, after the Players Association approved proposed protocol changes Friday.

The NFL and NFLPA had previously agreed to a revised protocol that would prohibit players returning to the field if they displayed signs of instability in their motor skills. The union issued a statement Friday requesting that the changes be put in place for this weekend’s games.

"Our union has agreed to change the concussion protocols to protect players from returning to play in the case of any similar incident to what we saw on September 25," the statement read. "We would like these changes to go into effect before this weekend’s game to immediately protect the players and hope the NFL accepts the change before then as well."

The September 25 incident the union referred to occurred in a game between the Miami Dolphins and Buffalo Bills, in which Dolphins quarterback Tua Tagovailoa briefly left the field with what the team initially termed a head injury.

Tagovailoa later returned to the game after passing concussion tests, with Miami head coach Mike McDaniel saying afterward that the injury was to the quarterback’s lower back.

The Dolphins later cleared Tagovailoa to play at Cincinnati four days after the Buffalo game, and the former Alabama star was injured again on a hit from Bengals defensive tackle Josh Tupou that caused his head to hit the ground hard.

Tagovailoa was stretchered off the field and taken to the hospital, and the Dolphins have since ruled him out for Sunday’s game against the New York Jets while confirming a concussion diagnosis.

The NFL later issued a statement saying it intends to also sign off on protocol changes, though it’s unclear when they will begin to be enforced.

"As we have discussed with the NFLPA, we agree that changes to the joint NFL-NFLPA protocols are necessary to further enhance player safety," the league said. "We have already spoken to members of the NFL Head, Neck and Spine Committee and the leadership of the Unaffiliated Neurotrauma Consultants and Independent Certified Athletic Trainers who serve as spotters to discuss these likely changes."

The NFL and the union remain in the process of investigating the Dolphins’ handling of Tagovailoa’s September 25 injury, in order to determine whether the team violated any protocols.