policies that comply with the requirements of this section. (j) Regulations Not later than 180 days after the date of enactment of this section, the Secretary shall prescribe such regulations as are necessary to carry out this section with respect to rail carrier employees. (k) Effective dates (1) Effective date This section shall take effect 6 months after the date of issuance of regulations under subsection (j). (2) Collective bargaining agreements In the case of a collective bargaining agreement in effect on the effective date prescribed by paragraph (1), this section shall take effect on the earlier of— (A) the date of the termination of such agreement