IRVING, Texas (AP) — NFL owners approved changes to the personal conduct policy Wednesday, but Commissioner Roger Goodell will retain authority to rule on appeals.

A special counsel for investigations and conduct will oversee initial discipline, Goodell said. The commissioner also may appoint a panel of independent experts to participate in deciding an appeal.

The players' union has sought negotiations with the NFL on any revamping of the policy, and said Tuesday it would "reserve the right to take any and all actions" should the owners act unilaterally. The union could consider Wednesday's vote by the owners as a violation of the collective bargaining agreement reached in 2011 to end the lockout of the players.