In the NFL, the chain crew switches sides at halftime; the referee determines their initial placement. On fields where both teams' benches are located on the same side of the field, the chain crew operates on the opposite side for the entire game (no NFL stadium has had benches on the same side since the Green Bay Packers stopped playing three games a year at Milwaukee County Stadium following the 1994 season; the last full-time stadium to have this setup was the Minnesota Vikings' Metropolitan Stadium, which closed following the 1981 season).