The EFL has confirmed that clubs will be able to use five substitutes from this Friday for the remainder of the season.
A statement reads: "Following consultation with clubs, the EFL board has agreed to increase the permitted number of substitutes to five in all Sky Bet EFL fixtures taking place from 12 noon on Friday 20th November for the remainder of the 2020/21 season.
"Regulation 33.4 has been amended to allow Championship Clubs to name up to nine substitutes in their matchday squad, with five permitted to take to the pitch in any fixture.
"League One and League Two clubs to name up to seven substitutes in their matchday squad, again with five permitted to take to the pitch.”
Each team is permitted a maximum of three opportunities, half-time aside, to make substitutions during the match in line with decisions previously made by the International FA Board (IFAB).
Town boss Lambert said a month ago that he was in favour of sticking with five subs, as were permitted when 2019/20 resumed in the summer, when this season got under way.
"Five subs was definitely one to look at,” he said. "Players are in an incredible situation where they’ve been off for six months and are now trying to cram everything in and trying to get games in, and five subs would have been common sense.”