The NFL approved a change to flex scheduling procedures at the league meetings in Palm Beach on Monday.
Per a report from Tom Pelissero of NFL Media, at least 24 teams voted in favor of a resolution that will allow the league to flex games from Sunday to Thursday night with 21 days notice.
The window for a flex was 28 days when the league approved flexing games to Thursday two years ago and that remained the window last season. A Week 16 Broncos-Chargers game last season is the only one that has been flexed into a Thursday night slot.
Flexes have been limited to the Week 13-17 window for the last two years with a maximum of two swaps in a season.
