The new format will be used for the first time this weekend in Azerbaijan, the first of the six sprint weekends on the 2023 schedule, with the Austrian, Belgian, Qatar, USA and Sao Paulo events to follow.
The changes have been designed to create a standalone Saturday event that doesn't impact the grid for Sunday's main race in an attempt to encourage drivers to push harder, as a mistake will be less costly.
The revised weekend timetable also addresses the issue of the previously largely redundant Saturday FP2 session, which no longer exists.
The rules were finalised during the April break after lengthy discussions by the team sporting directors and the FIA in the Sporting Advisory Committee.
They were approved by a unanimous vote at today's meeting of the F1 Commission, prior to being officially passed by the World Motor Sport Council.
As expected, on Fridays FP1 will be followed by race qualifying, with the grid for the main event set unless any extra penalties have to be applied.
Source: Autosport