All the NFL rule changes, including more replay assistance in case of replacement refs - The New York Times

All the NFL rule changes, including more replay assistance in case of replacement refs  The New York TimesPlan to assist replacement refs among approved NFL rules changes  ESPNO-Zone: Expert analysis  Jacksonville JaguarsNFL approves 1-year rule allowing replay center to correct mistakes by potential replacement refs  NFL.comKey questions about the NFL’s labor dispute with its referees and how it could impact games  The New York Times