of the enactment of this Act, the Secretary of Commerce shall publish in the Federal Register guidance with respect to how persons producing merchandise for exportation to the United States or seeking to import such merchandise into the United States may obtain a precertification described in subparagraph (A) or (B) of paragraph (1). (4) Appropriate official defined In this subsection, the term appropriate official means— (A) in the case of the United States, the Secretary of Commerce