of an employee under this Act or opposing any practice made unlawful by this Act. For purposes of section 3, such retaliation shall include taking an adverse employment action against any employee on the basis of that employee’s eligibility or perceived eligibility to request or receive a change in the terms and conditions of employment, as described in such section, on the basis of a reason set forth in section 3(c). (c) Interference with Proceedings or Inquiries It shall be unlawful for any person to discharge or in any other manner discriminate against any individual because such individual— (1) has filed any charge, or has instituted or caused to be instituted any proceeding, under or related to this Act