Wallabies lock Rob Simmons' eight week suspension has been cut to five weeks on appeal but he'll still miss Saturday's season-ending Test against Wales in Cardiff.
An IRB appeal hearing in Bristol on Tuesday reduced the ban Simmons received for a lifting tackle on French player Yannick Nyanga in Australia's European tour-opening 33-6 defeat in Paris on November 10.
He has since missed the Tests against England and Italy over the past two weekends.
A statement issued by the Six Nations Committee, which deals with disciplinary matters on behalf of the IRB during the European autumn internationals, said the appeal committee had determined Simmons' offence merited a mid-range penalty rather than a top end one as the judicial officer originally found.
"After applying aggravating and mitigating factors, the appeal committee imposed a reduced sanction of five weeks," the statement added.
"Therefore the player will be free to play from February 4, 2013."
As was the case with the original ban, the reduced punishment takes account of the close season inactivity after the end of Australia's tour when Williams and his Wallaby team-mates are not scheduled to play.