The move has been dubbed a progressive player welfare strategy.
Alongside the trials, a panel of independent concussion consultants - not affiliated with playing teams - will provide expertise on whether a player should return.
The trials include two used in the southern hemisphere – the goal-line drop out instead of a five-metre scrum when the ball carrier's held up over the line, and the 50:22 kick.
World Rugby didn't adopt the ability to replace a red-carded player after 20 minutes.
The other three trials focus on reducing injury risk at the breakdown.
Listen above as NZ Herald rugby writer Liam Napier discusses the news with D'Arcy Waldegrave
See omnystudio.com/listener for privacy information.
Popular Podcasts
Las Culturistas with Matt Rogers and Bowen Yang
Ding dong! Join your culture consultants, Matt Rogers and Bowen Yang, on an unforgettable journey into the beating heart of CULTURE. Alongside sizzling special guests, they GET INTO the hottest pop-culture moments of the day and the formative cultural experiences that turned them into Culturistas. Produced by the Big Money Players Network and iHeartRadio.
Crime Junkie
Does hearing about a true crime case always leave you scouring the internet for the truth behind the story? Dive into your next mystery with Crime Junkie. Every Monday, join your host Ashley Flowers as she unravels all the details of infamous and underreported true crime cases with her best friend Brit Prawat. From cold cases to missing persons and heroes in our community who seek justice, Crime Junkie is your destination for theories and stories you won’t hear anywhere else. Whether you're a seasoned true crime enthusiast or new to the genre, you'll find yourself on the edge of your seat awaiting a new episode every Monday. If you can never get enough true crime... Congratulations, you’ve found your people. Follow to join a community of Crime Junkies! Crime Junkie is presented by audiochuck Media Company.
Stuff You Should Know
If you've ever wanted to know about champagne, satanism, the Stonewall Uprising, chaos theory, LSD, El Nino, true crime and Rosa Parks, then look no further. Josh and Chuck have you covered.