persons Persons shall be treated as related to each other if such persons would be treated as a single employer under the regulations prescribed under section 52(b). (d) Special rules To secure the national supply chain (1) In general In the case of a qualified manufacturing facility, subsection (a) shall be applied— (A) by substituting 50 percent for 40 percent each place it appears therein, and (B) by substituting 50 percent for 30 percent in paragraph (3) therein. (2) Qualified manufacturing facility For purposes of this subsection, the term qualified manufacturing facility means any manufacturing facility if— (A) such manufacturing facility produces property required to be maintained in the strategic national stockpile under section 319F–2 of the Public Health Service Act, and (B) the production of such manufacturing facility is moved to the United States (including any possession of the United States) from a foreign country that the United States Trade Representative has determined could pose a risk to the national supply chain because of political or social factors. 1400AA–2. Designation of economically distressed zones (a) In general For purposes of this subchapter, the term economically distressed zone means any population census tract which— (1) has a poverty rate of not less than 35 percent for each of the 5 most recent calendar years for which information is available, or (2) satisfies each of the following requirements: (A) has pervasive poverty, unemployment, low labor force participation, and general distress measured as a prolonged period of economic decline measured by real gross national product, (B) has a poverty rate of not less than 30 percent, and (C) has been designated as such by the Secretary and the Secretary of Commerce pursuant to an application under subsection (b). (b) Application for designation (1) In general An application for designation as an economically distressed zone may be filed by a State or local government in which the population census tract to which the application