| 40th Arizona State Legislature | 
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| Legislative body | Arizona State Legislature | 
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| Jurisdiction | Arizona, United States | 
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| Term | January 1, 1991 – December 31, 1992 | 
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| Members | 30 | 
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| President | Peter Rios | 
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| Temporary President | A. V. "Bill" Hardt | 
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| Party control | Democrat (17–13) | 
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| Members | 60 | 
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| Speaker | {{{speaker}}} | 
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| Party control | Republican (33–27) | 
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| | 1st | January 14 – June 22, 1991 | 
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 | 2nd | January 13 – July 1, 1992 | 
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| | 1st | January 31 – February 2, 1991 | 
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 | 2nd | September 17 – September 17, 1991 | 
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 | 3rd | November 1 – November 7, 1991 | 
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 | 4th | December 2 – December 16, 1991 | 
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 | 5th | February 17 – February 22, 1992 | 
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 | 6th | February 17 – May 17, 1992 | 
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 | 7th | March 17 – March 31, 1992 | 
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 | 8th | April 8 – June 27, 1992 | 
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 | 9th | May 4 – July 1, 1992 | 
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The 40th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1991, to December 31, 1992, during the first two years of  Fife Symington's first term as governor. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Democrats flipped control in the Senate, gaining four seats and creating a Democratic majority of 17–13. The Democrats also gained two seats in the house, decreasing the Republican majority to 33–27.