Complex sentence: McKenzie exempted Tabb from the customary five-year refereeing apprenticeship and placed her on a fast-track toward officiating at professional ranking tournaments, which allowed her to qualify as a Class 3 snooker referee in September 2001.
Split into simpler sentences: McKenzie exempted Tabb from the customary five-year refereeing apprenticeship and placed her on a fast-track toward officiating at professional ranking tournaments. She qualified as a Class 3 snooker referee in September 2001.