His first Test match was in 1964 when the French toured New Zealand. Percival controlled 27 internationals between 1964 and 1980, the most for a New Zealand official. This included nine matches in the 1968 and 1975 World Cups. In 1995 Percival was one of the inaugural inductees onto the NZRL's Legends of League. He is an Auckland Rugby League Immortal.