Plan of Union - 1873
Charter of 1875
Charter Amendment of 1924
Charter Amendment of 1927
Charter Amendment of 1945
Charter Amendment of 1967
Charter Amendment of 1974
Charter Amendment of 1984
Charter Amendment of July 1984
Restated Charter of 1993
Resolution of April 16, 1993
Certificate of 1993
Covenant of 1993
Amended and Restated Charter 2006