; and (ii) if not used by the employee of such employer before the end of the 12-month period (as referred to in subsection (a)(1)) to which it relates, shall not accumulate for any subsequent use. . (b) Effective date The amendments made by this section shall apply with respect to any birth or placement that occurs on or after the date that is 6 months after the date of enactment of this Act. 5. Clarification for members of the National Guard and Reserves (a) Executive branch employees For purposes of determining the eligibility of an employee who is a member of the National Guard or Reserves to take leave under subparagraph (A) or (B) of section 6382(a)(1) of title 5, United States Code, or to substitute such leave pursuant to subsection (d)(2) of section 6382 of such title (as added by section 2), any service by such employee on covered active duty (as defined in section 6381(7) of such title) shall be counted as service as an employee for purposes of section 6381(1)(B) of such title. (b) TSA employees For purposes of determining the eligibility of an employee of the Transportation Security Administration (including security screening personnel described in section 111(d) of the Aviation and Transportation Security Act ( 49 U.S.C. 44935 note)) who is a member of the National Guard or Reserves to take leave in a circumstance described in subparagraph (A) or (B) of section 6382(a)(1) of title 5, United States Code, or to substitute such leave in a manner described in subsection (d)(2) of section 6382 of such title (as added by section 2), any service by such employee on covered active duty (as defined in section 6381(7) of such title) shall be counted as service as an employee for purposes of determining whether the employee has completed 12 months of service as an employee. (c) Congressional Employees For purposes of determining the eligibility of a covered employee (as such term is defined in section 101(3) of the Congressional Accountability Act of 1995 ( 2 U.S.C. 1301(3) )) who is a member of the National