Several new laws have been introduced for the 2021-22 Premiership campaign to improve player welfare and encourage attacking play.
The laws form part of a trial by World Rugby, with the governing body aiming to making the game safer before the 2023 Rugby World Cup in France.
A 50:22 kick has been introduced, while a goalline drop-out will replace the award of scrums on the five-metre line.
Three laws concerning the breakdown have also been amended.
These concern pre-bound pods of players, lower-limb clear-outs and laws relating to latching.
Meanwhile, a panel of World Rugby Independent Concussion Consultants (ICC) will be also introduced into the Premiership.
The ICC panel will provide independent expert opinion on whether a player should return to action following a confirmed concussion and the successful completion of the six-stage graduated return to play process for elite competitions.