The rugby unions of South Africa, New Zealand, Australia, France, England, Ireland and Italy are among the nations that have warned that any player who joins the rebel R360 league will not be eligible to play for their country.
On Wednesday, the British and Irish Lions released a similar statement that impacts the inaugural women's tour in 2027. The men's side is set to tour New Zealand in 2029.
"As we continue preparations for the inaugural Lions Women's Tour in 2027, The British & Irish Lions wishes to outline its position on the proposed R360 competition and provide clarity to players," it read.
"The British & Irish Lions fully support the position of our constituent Unions in relation to the proposed competition and will be advising that any player who decides to participate in R360 will not be eligible for selection for the 2027 Tour to New Zealand.
"This is the first-ever Lion's Women Tour, a historic moment for women's rugby and we want it to be the best it can be. With the tour just over a year and a half away, we believe it is important that players who may be selected are playing in established leagues that provide certainty on calendar and playing schedule.
"The British & Irish Lions will continue to work collaboratively with its Unions to support the growth of our game at all levels, ensure alignment with international and domestic calendars and prioritise player welfare."
Wales legend George North has brought the curtain down on his professional career, saying he has fulfilled his "childhood dream" after years at the top of the game.
SA Rugby CEO Rian Oberholzer has described it as "tragic" if the British and Irish Lions no longer tour South Africa on their established 12-year schedule.
Rugby Australia has confirmed it is debt-free after the British and Irish Lions tour helped drive a record 70.6 million dollar operating surplus for 2025, marking a major financial turnaround for the union.
Former Wales and British and Irish Lions full-back Liam Williams has brought an end to his illustrious rugby career with immediate effect.
