Question: The incumbent Democrat that was term-limited in the 1983 Mississippi gubernatorial election is best remembered for the passage of what act?

Context paragraphs:
Mississippi gubernatorial election, 1951: The 1951 Mississippi gubernatorial election took place on November 6, 1951, in order to elect the Governor of Mississippi.  Incumbent Democrat Fielding L. Wright was term-limited, and could not run for reelection to a second full term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Mississippi gubernatorial election, 1915: The 1915 Mississippi gubernatorial election took place on November 2, 1915, in order to elect the Governor of Mississippi.  Incumbent Democrat Earl L. Brewer was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate won in a landslide in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Mississippi gubernatorial election, 1983: The 1983 Mississippi gubernatorial election took place on November 8, 1983, in order to elect the Governor of Mississippi.  Incumbent Democrat William Winter was term-limited, and could not run for reelection to a second term.

Mississippi gubernatorial election, 1935: The 1935 Mississippi gubernatorial election took place on November 5, 1935, in order to elect the Governor of Mississippi.  Incumbent Democrat Martin S. Conner was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Mississippi gubernatorial election, 1931: The 1931 Mississippi gubernatorial election took place on November 3, 1931, in order to elect the Governor of Mississippi.  Incumbent Democrat Theodore G. Bilbo was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Mississippi gubernatorial election, 1943: The 1943 Mississippi gubernatorial election took place on November 2, 1943, in order to elect the Governor of Mississippi.  Incumbent Democrat Paul B. Johnson Sr. was term-limited, and could not run for reelection to a second term (he died less than two months after the election was held).  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

William Winter (politician): William Forrest Winter (born February 21, 1923) is a retired American politician who served as the 58th Governor of Mississippi from 1980 to 1984.  A Democrat, he is known for his strong support of public education, freedom of information, racial reconciliation, and historic preservation.  Winter is best remembered for the passage of the Mississippi Education Reform Act.  The law was the first serious attempt at improving state education in over 20 years and established public kindergartens.  The Winter administration also successfully rewrote the state public utilities law when the legislature passed the Public Utilities Reform Act.

Mississippi gubernatorial election, 1923: The 1923 Mississippi gubernatorial election took place on November 6, 1923, in order to elect the Governor of Mississippi.  Incumbent Democrat Lee M. Russell was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Mississippi gubernatorial election, 1955: The 1955 Mississippi gubernatorial election took place on November 8, 1955, in order to elect the Governor of Mississippi.  Incumbent Democrat Hugh L. White was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Mississippi gubernatorial election, 1939: The 1939 Mississippi gubernatorial election took place on November 7, 1939, in order to elect the Governor of Mississippi.  Incumbent Democrat Hugh L. White was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Supporting paragraphs: Mississippi gubernatorial election, 1983 William Winter (politician)
Answer: Mississippi Education Reform Act