Clubs will be permitted to contract a total of six international players during BBL|09 - up from four last summer.
Teams will still only be entitled to have a maximum of two overseas players on their roster at a given time, but can nominate another four internationals as replacement players if required.
The change allows clubs increased flexibility to rotate international players in and out of their squads and better manage player availability.
Decisions on clubs’ replacement requests remain at the discretion of the BBL Technical Committee.
Afghanistan’s Rashid Khan is already contracted to the Adelaide Strikers for next season but South African batsman Colin Ingram advised the club he would not return for BBL|09 due to family reasons.
Cricket Australia Executive General Manager Fan Engagement Anthony Everard said the change would give clubs more options and improve the standard of the competition.
"At the conclusion of each season we take the time to review what’s working well and where we can make positive changes to the game and the fan experience,” Everard said.
"The maximum number of overseas players permitted in a club’s squad will remain at two, but there is now increased flexibility to contract up to six players throughout the season and rotate them in and out as required.
"It’s a fantastic result for the competition, with clubs given a better chance at securing international players on a short-term basis to fit into an increasingly competitive global cricketing calendar."
The BBL|09 fixture is expected to be announced in the coming months and could include a revamp to the competition’s finals structure.