; (B) does not modify the treatment of the former spouse as the beneficiary under the contract who is entitled to the survivor benefits; or (C) does not modify the treatment of the former spouse as the measuring life for the survivor benefits under the contract. (b) Effective dates, enforcement, and interpretations (1) Effective dates (A) Paragraphs (1) and (2) of subsection (a) shall be effective with respect to contracts purchased or received in an exchange on or after the date of enactment of this Act. (B) Paragraph (3) of subsection (a) shall be effective with respect to contracts purchased or received in an exchange on or after July 2, 2014. (2) Enforcement and interpretations Prior to the date that the Secretary of the Treasury issues final regulations pursuant to subsection (a)— (A) the Secretary shall administer and enforce the law in accordance with subsection (a) and the effective dates in paragraph (1) of this subsection