19 U.S.C. § 2021 General authority
A petition may be filed for tariff adjustment or for a determination of eligibility to apply for adjustment assistance under title III of the Trade Expansion Act of 1962 [19 U.S.C. 1901 et seq.] as though the reduction or elimination of a duty proclaimed by the President pursuant to section 2011 or 2012 of this title were a concession granted under a trade agreement referred to in section 301 of the Trade Expansion Act of 1962 [19 U.S.C. 1901].