In 1965, with the support of the Ontario government, the university established a medical school and teaching hospital, graduating its first class of physicians in 1972. In 1968 the university was reorganized under an amended act of the McMaster Act into the Divisions of Arts, Science, and Health Sciences, each with its own vice-president, while the Divinity College continued under its existing arrangement. In 1974 the divisional structure of the university was dissolved and reorganized again under "The McMaster University Act, 1976" and the vice-presidents were replaced by a single Vice-President (Academic). The Faculties of Business, Engineering, Health Sciences, Humanities, Science, and Social Sciences were retained, each under the leadership of a dean.