The FIA World Motor Sport Council has approved the Endurance Commission's proposal of limiting the power from energy recovery systems in LMP1 due to safety concerns.
Under current LMP1 regulations cars can deploy power simultaneously from its engine and hybrid units to produce an output of over 1000hp.
The Endurance Commission are looking to put a cap on total power output to a maximum of 1000hp - while maintaining the developments on hybrid technology - which has now been given the green light by the World Motor Sport Council.
It hasn't been confirmed whether the regulation changes will take effect for the 2016 championship or be delayed until the season after, but it is expected to reduce Porsche's current advantage in LMP1. The German manufacturer holds the upper hand on its rivals Audi or Toyota after unlocking a higher power output from its hybrid system.
Additional technical regulation changes are also set to be introduced in the LMP1 class to refuelling, bodywork, wheels, rim material, mirrors and cockpit safety equipment, while alterations to mirrors, power unit costs and safety equipment in LMP2 are also in the pipeline.
The World Motor Sport Council has also approved rule changes within the FIA World Endurance Championship, with the number of LMP2 engines used over a season to not include the Prologue and a 80km/h speed limit for all drivers in a red flag period.
Confirmation of the rules proposed are expected in the coming weeks.