SAN FRANCISCO (CBS SF) — Prop C, the 2018 initiative that taxes wealthy San Francisco businesses to pay for homeless services, became law Wednesday after the California Supreme Court refused to hear a challenge to it.

Prop C, which implements a .5% tax on businesses making over $50 million a year, passed in 2018 with more than 61 percent of the vote.

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But the law’s been held up in the courts by lawsuits filed by the Howard Jarvis Taxpayers Association, the anti-tax lobbyists. The group claimed that the tax needed two-thirds of the vote to pass, but the state court of appeals rejected this argument back in June.

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Now that the state supreme court refused to hear the case, the city can collect an estimated $300 million in fees for services supporting San Francisco’s homeless population.

Proponents of the measure celebrated on social media.

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The Howard Jarvis Taxpayers Association had not released a statement by press time.