Williams had been dismissed with a red card (after having received two yellow cards) in the Guinness PRO12 match between Scarlets and Ulster at Parc y Scarlets on Saturday, 6 September 2014.
The Disciplinary Committee, chaired by David Martin (Ireland) alongside Paul Minto (Scotland) and Simon Thomas (Wales), viewed the footage of the incidents and considered the match officials' reports and written submissions from the player.
The Disciplinary Committee found that the referee had not been wrong to issue the red card but decided not to impose a playing suspension on Williams. Liam Williams is therefore free to resume playing rugby immediately.
Follow us on Facebook, join the conversation on Twitter, sign up to our YouTube channel for extensive match highlights and sign up for our newsletter for regular updates on the GUINNESS PRO12
Guinness PRO12
Suite 208, Alexandra House,
The Sweepstakes
Ballsbridge, Dublin 4, Ireland