; or (2) during an emergency period (as defined in section 1135(g)(1)(A) of the Social Security Act ( 42 U.S.C. 1320b–5(g)(1)(A) ). (c) Modifications to trade agreements (1) In general Not later than 30 days after the date of the enactment of this Act, the United States Trade Representative shall modify United States product coverage under all free trade agreements and the World Trade Organization Agreement on Government Procurement to exclude coverage of essential medicines and medical countermeasures. (2) Modification of waivers Subsequent to the modifications made under paragraph (1), the United States Trade Representative shall make any necessary corresponding modifications of existing waivers under section 301 of the Trade Agreements Act of 1979 ( 19 U.S.C. 2511 ). (3) Notification to the President Subsequent to the modifications made under paragraphs (1) or (2), the United States Trade Representative shall notify the Director of the Office of Management and Budget. (d) Definitions In this section: (1) Covered drug The term covered drug means a drug (including the active pharmaceutical ingredients thereof) marketed in the United States pursuant to an approval or licensure under subsection (c) or (j) of section 505 of the Federal Food, Drug, and Cosmetic Act ( 21 U.S.C. 355 ) or under subsection (a) or (k) of section 351 of the Public Health Service Act ( 42 U.S.C. 262 ). (2) Executive agency The term executive agency has the meaning given that term in section 133 of title 41, United States Code. (3) United States The term United States means each of the several States, the District of Columbia, and each territory or possession of the United States. (e) Severability clause If any provision of this Act (or the application of that provision to particular persons or circumstances) is held invalid, the remainder of this Act (or the application of that provision to other persons or circumstances) shall not be affected. (f) Effective date The provisions of this section shall apply beginning on the date that is one