of this Act, the Secretary of Homeland Security shall issue proposed rules to carry out title XXI of the Homeland Security Act of 2002, as added by subsection (a). (B) Final rules Not later than 18 months after the date of enactment of this Act, the Secretary of Homeland Security shall issue final rules to carry out title XXI of the Homeland Security Act of 2002, as added by subsection (a). (2) Consultation In developing and implementing the rules issued under paragraph (1), the Secretary of Homeland Security shall consult with the Administrator of the Environmental Protection Agency, and other persons, as appropriate, regarding— (A) the designation of substances of concern