In 1983, deputy heads were allowed to join, with other senior teaching staff following in the early 1990s and business managers in 2005.
[1] The ASCL's membership is formed of headteachers, principals, deputy heads, vice-principals, assistant heads, assistant principals, business managers and other senior post holders in schools and colleges.
It has members in every type of school including community, foundation, trust, academy, voluntary, independent, grammar, comprehensive, and special schools, and also in FE and sixth form colleges both maintained and independent.
It has at least one member from virtually all such schools and colleges, in the great majority including the headteacher or principal.
[2][citation needed] The Association of School and College Leaders has as its ruling body a group of elected members collectively known as council.