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This edition of NFPA 12A, Halon 1301 Fire Extinguishing Systems, was prepared by the TechnicalCommittee on Gaseous Fire Extinguishing Systems. It was issued by the Standards Council onNovember 10, 2017, with an effective date of November 30, 2017, and supersedes all previouseditions.This edition of NFPA 12A was approved as an American National Standard on November 30,2017.