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42 U.S.C. 7401 et seq.
36 FR 24877, Dec. 23, 1971, unless otherwise noted.
65 FR 76355, Dec. 6, 2000, unless otherwise noted.
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(a) For data collected during the first half of a calendar year, submit your semiannual report by August 1 of that year.
(b) For data you collected during the second half of the calendar year, submit your semiannual report by February 1 of the following year.