; (II) an entity employing a State employee described in section 304(a) of the Government Employee Rights Act of 1991; (III) an employing office, as defined in section 101 of the Congressional Accountability Act of 1995; (IV) an employing office, as defined in section 411(c) of title 3, United States Code; or (V) an employing agency covered under subchapter V of chapter 63 of title 5, United States Code; and (ii) engaged in commerce (including government), or an industry or activity affecting commerce (including government). (B) Covered employer (i) In general In subparagraph (A)(i)(I), the term covered employer — (I) means any person engaged in commerce or in any industry or activity affecting commerce who employs an employee for each working day during each of 20 or more calendar workweeks in the current or preceding year; (II) includes the Government Accountability Office and the Library of Congress; (III) includes any public agency; (IV) includes— (aa) any person who acts, directly or indirectly, in the interest of an employer covered by this clause to any of the employees of such employer; and (bb) any successor in interest of such an employer