World Rugby is planning to run trials on red cards and examine tackle height in the elite game as part of moves to improve the sport's safety and appeal.
The governing body says it is focused on "enhancing ball in flow, reducing stoppages and increasing welfare". Phase three will see trials adopted by unions in their domestic games "aimed at enhancing game continuity". They include the expansion of the shot clock for scrum and line-outs and reduced kicking time.
In the new measures, a player who is sent off will not be allowed to return to the field but is replaced after 20 minutes, in an attempt to increase the competitiveness of matches.
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