Eight of rugby's leading unions have released a shared statement in which they state any player who joins rebel circuit R360 will be banned from playing for their country.
England, Ireland, France, Scotland, Italy, New Zealand, South Africa and Australia have joined forces to make clear anyone who takes part in the proposed rebel rugby union tournament will be unable to play Test rugby.
Wales and Argentina are the only Tier 1 nations not included on the statement.
"As a group of national rugby unions, we are urging extreme caution for players and support staff considering joining the proposed R360 competition," the statement read.
"Each of the national unions will therefore be advising men's and women's players that participation in R360 would make them ineligible for international sel