Wales vice-captain Colin Charvis has avoided being caught in a row between England's club sides and Scotland. Newcastle chief Rob Andrew said he did not have to release Charvis for Wales' match with South Africa on 6 November.
Andrew said he had received those instructions from Premier Rugby, the Zurich Premiership's governing body.
But Premier chief Howard Thomas told BBC Wales that Andrew was "mistaken", as the instructions only referred to the release of Scotland internationals.
"Rob is mistaken and I will have to speak to him to let him know," Thomas said on Tuesday morning, confirming that the dispute was solely with the Scottish Rugby Union.
The SRU added an extra Test match against the Wallabies for 6 November, but that was not arranged until late in August.
Premier Rugby believes that late arrangement now falls outside the International Rugby Board's official calendar 'window' for playing internationals - even though Wales' clash with South Africa the same afternoon is apparently acceptable.
"There will be no compulsory release of (Scotland) players and... we expect clubs to play their full-strength sides that weekend," Thomas told The Scotsman on Monday night.
"We have commitments to our sponsors, broadcaster and others and they have a right to expect the best.
"We can't allow the club game to be killed off because there is too much international rugby going on."
As a result, Newcastle have been told they need not release Scotland internationals Stuart Grimes and Craig Hamilton, while other Zurich Premiership clubs have received the same instructions.
Other England-based Scots who could miss the Test against the Wallabies at Murrayfield are Tom Smith of Northampton, Ben Hinshelwood of Worcester and Rob Russell of London Irish.
However, Leeds - who have former Wales international Phil Davies as coach - look set to defy Premier Rugby and release Gordon Ross, Duncan Hodge and Gavin Kerr.
Charvis and Alix Popham - who is at Leeds - are the only players currently in the Wales squad who ply their trade in England.
But Wales also have skipper Gareth Thomas (Toulouse), fly-half Stephen Jones (Clermont-Auvergne) and lock Gareth Llewellyn (Narbonne) playing abroad in France.
Last month several French clubs raised a similar argument - that the late addition of 6 November to the international calendar did not give them sufficient notice.
However, after the involvement of the IRB, Wales resolved that argument in its favour.
World rugby's governing body has always been clear that a club must release a player once he is called up for international duty, unless he is injured.
If those rules are again applied, then it is likely that Premier Rugby will be forced to back down.
Should a player not be released for an international match, he is then banned from playing for his club side during that period.
MMIX
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We can't allow the club game to be killed off because there is too much international rugby 
