Amid reports linking Leigh Halfpenny to Toulon, Cardiff Blues CEO Richard Holland has insisted that the Lions full-back "is not permitted to enter into negotiations with any other party".
Much speculation has surrounded the future of 24-year-old Halfpenny, who is the target of a number of potential suitors having followed up his Player of the Six Nations award by being named Lions Man of the Series in Australia in June.
While reports in the French press have suggested that Halfpenny, who is out of contract with the Welsh region at the end of the season, will travel to Toulon this weekend to begin contract talks, Holland is adamant that no such discussions are possible.
"Leigh or his representatives would have to seek written permission from Cardiff Blues if they want to go and have a contractual discussion with another party regarding his employment," Holland told the Western Mail.
"I haven't had any such request and I am not aware of him going out to France. Leigh hasn't sought permission from us to have discussions with any other club. So, as far as we are concerned, he is not permitted to enter into negotiations or even discussions with any other party."
Holland believes the Blues will be able to hang onto the 44-cap Welsh international despite the growing trend for top players to head abroad.
"I am confident of securing his services before permitting him to speak to other parties," added Holland.
"If I get to a position where I can't secure his services, who am I to stand in his way and he can openly then go and discuss with other clubs.
"If talks break down with him and he asks for permission to go and speak to Toulon I couldn't say no to that request. But, at the moment, I haven't granted permission."