The regulations prescribed under paragraph (1) shall be the same as substantive regulations promulgated by the Secretary to carry out this Act except insofar as the President (or designee) may determine, for good cause shown and stated together with the regulations prescribed under paragraph (1), that a modification of such regulations would be more effective for the implementation of the rights and protections involved under this section. (d) Employees covered by chapter 63 of title 5 , United States Code (1) Authority Not later than 90 days after the Secretary prescribes regulations under subsection (a), the Director of the Office of Personnel Management shall prescribe such regulations as are necessary to carry out this Act with respect to employees described in section 4(4)(E) and other individuals affected by employers described in section 4(5)(A)(i)(V). (2) Agency regulations The regulations prescribed under paragraph (1) shall be the same as substantive regulations promulgated by the Secretary to carry out this Act except insofar as the Director may determine, for good cause shown and stated together with the regulations prescribed under paragraph (1), that a modification of such regulations would be more effective for the implementation of the rights and protections involved under this section. 15. Effective dates (a) Effective date This Act shall take effect 6 months after the date of issuance of regulations under section 14(a)(1). (b) Collective bargaining agreements In the case of a collective bargaining agreement in effect on the effective date prescribed by subsection (a), this Act shall take effect on the earlier of— (1) the date of the termination of such agreement