The game day roster is set to rise by one when the puck drops in September.
The ten teams, including Fife Flyers, will be allowed a maximum of 20 skaters - up to 14 of them imports.
The agreement was reached this week as the first foundations were laid for the new season.
The maximum number of non-homegrown players that can be signed in a single season, excluding injury reserve, remains at 20 - giving clubs no more than six changes.
Last season, the EIHL said the average bench size per team across 329 games, was18.4 skaters.
That broke down as 5.6 defencemen; 10.8 forwards and 13.1 non-homegrown players