At its inception, the AMS represented all students attending Queen's University. However, that changed in 1981 when the Graduate Students' Society (GSS), an AMS member society formed in 1962, voted by referendum to secede from the AMS. This secession developed out of a conflict around graduate student representation, student services, policy positions, and other issues. In the 1990s, the AMS saw the Theological Society and the Law Students' Society also leave the AMS - the latter over a dispute regarding student constables - to join the GSS. Through an amendment to its constitution and by-laws, the GSS was renamed the Queen's University Society of Graduate and Professional Students, in order to recognize the membership of professional students, including law, divinity, and occupational health students.