; or (2) during the 11 hours following the end of a work shift or on-call shift that spanned 2 days. (b) Consent (1) In general An employee may consent to work a shift as described in subsection (a), if the covered employer obtains the employee’s consent in writing. Such consent may be for each such shift or for multiple shifts. (2) Revocation An employee may revoke the consent provided under paragraph (1), in writing, at any time during the employment. (c) Compensation For each instance that an employee of a covered employer works a shift described in subsection (a), the covered employer shall compensate the employee at 1.5 times the employee’s scheduled rate of pay for the hours worked that are less than 11 hours apart from the hours worked during the previous shift. 6. Prohibited acts (a) Interference with rights It shall be unlawful for any employer to interfere with, restrain, or deny the exercise or the attempt to exercise, any right provided under section 3, 4, or 5. (b) Retaliation prohibited It shall be unlawful for any employer to discharge, threaten to discharge, demote, suspend, reduce work hours of, or take any other adverse employment action against any employee in retaliation for exercising the rights 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 request for a change in work schedule, or because of an 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