The National Union of Students (NUS) is the peak representative body for Australian university students. Most student unions in Australian campuses are affiliated to NUS. A university is eligible by its classification as a legitimate training provider and the payment of Union fees by the university according to the number of full time study units of its students.The operations of NUS are dominated by several different organised factions, often with close ties to the youth wings of Australian political parties. Current major factions at NUS include National Labor Students (Socialist Left), Student Unity (Labor Unity), Socialist Alternative and WA Independents. There are additional minor groupings including the Greens and the Australian Liberal Students' Federation (ALSF).