(4) shall be subject to any other provision of Federal law requiring the person or entity to participate in the E-Verify Pilot Program described in section 403(a) of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 ( 8 U.S.C. 1324a note), as in effect before the date of the enactment of this Act, including Executive Order 13465 ( 8 U.S.C. 1324a note), and all references to the E-Verify Pilot Program or a requirement to participate in an employment verification program, shall be deemed to refer to the E-Verify program established under section 4 of such Act. (c) Early compliance (1) Former e-Verify required users, including Federal contractors Notwithstanding the deadlines set forth in subsection (b)(1), beginning on the date of the enactment of this Act, the Secretary of Homeland Security shall require employers required to participate in E-Verify described in section 403(a) of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 ( 8 U.S.C. 1324a note), including employers required to participate in such program by reason of Federal acquisition laws (and regulations promulgated under those laws, including the Federal Acquisition Regulation), to use E-Verify (and comply with any additional requirements of such Federal acquisition laws and regulation). (2) Former e-Verify voluntary users and others desiring early compliance Notwithstanding the deadlines set forth in subsection (b)(1), beginning on the date of the enactment of this Act, the Secretary of Homeland Security shall provide for the voluntary use of E-Verify by employers voluntarily electing to participate in the E-Verify program described in section 403(a) of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 ( 8 U.S.C. 1324a note) before such date, and by other employers seeking voluntary early compliance. 7. Penalty for failure to use e-Verify If a person or entity fails to utilize E-Verify as required by law, including failing to comply with section 6(b)(5) or providing information to the