The Australian Capital Territory became a full member in 1990 as a consequence of being granted full self-governance with the passing of Australian Capital Territory (Self-Government) Act 1988.
New Zealand became a full member in 1991 after previously having observer status.
Australian Local Government Association, Norfolk Island and Papua New Guinea had observer status.
COAG agreed to create a number of councils and governance fora but the Cultural Ministers Council was not identified to transition to this new structure and its remit was withdrawn on 30 June 2011.
"Review of COAG Councils and Ministerial Forums: Report to National Cabinet" (PDF).
"Meeting of Cultural Ministers - Communiqué - 12 August 2011" (PDF).