In a letter to WRU member clubs, Gerald Davies said he made his decision not to stand for re-election to the board "with considerable sadness".
'On and off the field I hope I have demonstrated my passion and commitment to the game at all levels and I have endeavoured at all times to bring my lifetimes experience and knowledge to help contribute to the well-being of the game and all those who are involved in it throughout Wales as well as on the International stage.
I have always believed and stated that as rugby changes so its organisation must also change anD develop for the common good of all.
I do not wish to sever my ties completely with rugby and will constantly look for opportunities to encourage and support the game that is so dear to my heart.
I will watch with interest how the WRU meets the many challenges ahead."
More top news
A clear and quiet night, with chilly temperatures in places and a possible grass frost too!
Long delays on the roads for Ed Sheeran concert goers after serious accident on the M4
Volunteers facing massive clean up operation after piles of rubbish are left at Rhyl's Marsh Tracks