BERKELEY (AP/CBS SF) — The association for fraternities in the U.S. and Canada says most of its members have one year to ban hard alcohol under a rule adopted during its recent annual meeting.

The North-American Interfraternity Conference said Tuesday that in “a near-unanimous vote” on Aug. 27, its 66 international and national men’s fraternities adopted the rule prohibiting hard alcohol from fraternity chapters and events unless served by licensed third-party vendors. The member fraternities have until Sept. 1, 2019, to implement the rule across their more than 6,100 chapters on 800 campuses.

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The rule adoption follows the alcohol-related deaths last year of fraternity pledges at Louisiana State University and Penn State University.

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Conference president and CEO Judson Horras says the new rule shows the fraternities’ focus on the safety of their members.

An alumni of NIC-member Pi Kappi Phi fell to his death at the frat house in Berkeley in 2015. Police said alcohol appeared to be a factor. In 2014, a 20-year-old man was found dead at the Zeta Psi frat house located near the UC Berkeley campus.

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