Tuesday 18 October 2016 18:01, UK
Wales do not have any concerns over the availability of their Aviva Premiership players despite the opening Autumn Test falling short of the PRL window.
Premiership Rugby Limited have officially authorised their players' release for the three weekends from November 12 to 26, but the Australia match in Cardiff is on November 5.
Howley confirmed that nothing has been said on the matter between PRL, its clubs or Wales Rugby Union and the players themselves believe they have permission to play.
He said: "We've had no formal conversations with any of the English clubs or PRL.
"But having spoken to the players, they are available to play. I have spoken to the likes of Jamie Roberts, George North and Taulupe Faletau.
"Taulupe is injured but, having spoken to Jamie and George, as far as we are concerned they are available for the Australia game."
Premiership Rugby recently clashed with England and the RFU over a number of players who returned from a gruelling training camp with serious injuries.
Howley announced six Premiership players in his squad to face the Wallabies, Japan, Argentina and South Africa, including Northampton's North, Harlequins' Roberts and Bath's Faletau.
Faletau's club team-mate Luke Charteris, Exeter's Tomas Francis and Gloucester's Ross Moriarty make up the six.
