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PART 312 - INVESTIGATIONAL NEW DRUG APPLICATION Authority:21 U.S.C. 321, 331, 351, 352, 353, 355, 360bbb, 371; 42 U.S.C. 262. Source:52 FR 8831, Mar. 19, 1987, unless otherwise noted. Editorial Note:Nomenclature changes to part 312 appear at 69 FR 13717, Mar. 24, 2004.