Proposition 19 may refer to a California ballot initiative:
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2020 California Proposition 19
California Proposition 19 (2020), also referred to as Assembly Constitutional Amendment No. 11, is an amendment of the Constitution of California that was narrowly approved by voters in the general election on November 3, 2020, with just over 51 ...
, a successful property tax change
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2010 California Proposition 19, a failed attempt at marijuana legalization
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1972 California Proposition 19, a failed attempt at marijuana legalization
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