Gerhard Roodt has been a rugby referee at the Blue Bulls Rugby Union in Pretoria since 1981. In 1996 he became an executive member of the Referee Society and served as chairman in ...ver maisGerhard Roodt has been a rugby referee at the Blue Bulls Rugby Union in Pretoria since 1981. In 1996 he became an executive member of the Referee Society and served as chairman in 2010 and 2011. The constant changes in rugby laws and the evolving of the game led to his research in how the game and its laws began.ver menos