Timeline: Marijuana Legalization in California

California became the first state to legalize medical marijuana, and with the new law in 2018, Northern California is on the verge of becoming the legal marijuana capital of the world.

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AMSTERDAM, NETHERLANDS - FEBRUARY 07: A cannabis plant grows in the Amsterdam Cannabis College, a non profit charitable organisation that gives information on cannabis and hemp use on February 7, 2007 in Amsterdam, Netherlands. The city council in Amsterdam has recently voted in favour of introducing a citywide ban on smoking marijuana in public areas. A successful trial ban in the De Baarsjes district of Amsterdam has been declared a success after a reduction in anti social behaviour. (Photo by Christopher Furlong/Getty Images)
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California passed the Poison and Pharmacy Act in 1907 that banned the sale of opium, cocaine, or morphine without a prescription. In 1913, cannabis was included on the list of banned drugs, making the Golden State the first to prohibit marijuana. (Photo by Christopher Furlong/Getty Images)
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The Marihuana Tax Act of 1937 made the possession or transfer of marijuana illegal across the United States under federal law. Medicinal use was legal but it created an expensive fee system to tax its use. (Photo by Justin Sullivan/Getty Images)
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The Golden State was the first in the U.S. to independently attempt to legalize marijuana in 1972 with Proposition 19, which attempted to decriminalize marijuana possession and sale. The law failed to pass with 66.5% voting against it. (Photo by Spencer Platt/Getty Images)
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Berkeley voters passed the Berkeley Marijuana Initiative I, prohibiting officers from making marijuana-related arrests unless approved by the city council first. (Photo by Justin Sullivan/Getty Images)
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The Moscone Act in California changed possession of an ounce or less of marijuana from a felony to a misdemeanor. (Photo by Sean Gallup/Getty Images)
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Berkeley voters passed an ordinance that made growing, possession, transportation and sale of marijuana the lowest priority for police. (Photo by Justin Sullivan/Getty Images)
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A judge ruled that the DEA hindered cannabis research and allowed the drug to be used safely, claiming it was a therapeutic product. Later that year, researchers discovered cannabinoid receptors in the human brain that lead to a better understanding of how drugs affect the central nervous system. (Photo by Justin Sullivan/Getty Images)
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The Board of Supervisors in California become the first city government to recognize marijuana for its medicinal purposes. That year, the enforcement of marijuana laws became the city’s lowest priority. (Photo by Justin Sullivan/Getty Images)
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Voters in California passed Proposition 215, legalizing the use and sale of marijuana for medicinal purposes, but the law conflicted with federal statutes. (Photo by Justin Sullivan/Getty Images)
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The Golden State introduces a three-year program for medical research, gearing their focus on the drug as a medical treatment. The legislation led to funding the University of California’s Center for Medicinal Cannabis Research at UC San Diego. (Photo by Ethan Miller/Getty Images)
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Oakland passes a measure to allow regulation and taxation of cannabis for adult use, making the prosecution of adults who use or possess marijuana a low priority for law enforcement. (Photo by David McNew/Getty Images)
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Governor Schwarzenegger passes SB 1449, making the possession of less than an ounce of marijuana a misdemeanor and civil infraction in the state of California. (Photo by Ethan Miller/Getty Images)
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The city of Oakland votes to approve a citywide plan to cultivate medical marijuana in four factories. The plans were later dismissed after the Obama administration warned Oakland that they would be in violation of federal law. (Photo by Ethan Miller/Getty Images)
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Proposition 19 would have legalized the recreational use of marijuana for adults 21 years and older but it was defeated - 54 percent voted against it. (Photo by Spencer Platt/Getty Images)
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Four U.S. attorneys for the state of California begin to prosecute property owners and landlords who rent buildings used to sell or grow marijuana. (Photo by Drew Angerer/Getty Images)
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Mendocino County ends its permit program (the first in the nation) to medical marijuana growers after receiving pressure form the federal government. (Photo by Uriel Sinai/Getty Images)
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In a state poll, at least 55 percent of voters agreed they would support the legalization of marijuana. (Photo by Spencer Platt/Getty Images)
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The Golden State begins to draft new regulations for medical marijuana programs, establishing rules for growing cannabis, setting fees and licensing standards. (Photo by Justin Sullivan/Getty Images)
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Proposition 64 is approved by California voters, legalizing the recreational use of marijuana in the state. (Photo by Christopher Furlong/Getty Images)
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After the approval of the Marijuana Act in 2016, weed will be legal in the state of California starting Jan. 1, 2018. (Photo by Drew Angerer/Getty Images)
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