The Football League will revert to five named substitutes for matches this season following a vote by clubs.
The League had followed the Premier League in naming seven substitutes for matches the 2010-11 campaign.
But clubs frequently struggled to muster 18 players for a match-day squad when injuries hit.
Teams will still be permitted seven named substitutes in the Carling Cup and FA Cup, but only five in the Johnstone's Paint Trophy.
"This was felt to be a sensible and prudent step given the financial challenges facing many football clubs and the commitment made earlier this summer to adopt Uefa's Financial Fair Play framework," a League spokesman said.