Wing suffered a double-blow to the head in the opening clash against England.
Wales international George North will be replaced by Lian Williams after the wing was knocked out twice in the opening Six Nations 21-16 defeat to England with two nasty blows to the head.
The second hit went unnoticed by the Wales medical staff – and controversy inescapably followed as North should not have played on in the match given the potential serious repercussions of the injury – and World Rugby demanded a full report on why the Northampton Saints star remained on the pitch.
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The Welsh Rugby Union have now taken the sensible decision to allow the 22-year-old ‘extended recovery time':
Liam Williams comes into the starting side with Scott Williams onto the bench. George North given extended recovery period
— Welsh Rugby Union (@WelshRugbyUnion) February 11, 2015