; and (2) by adding at the end the following: (2) An employee may elect to substitute for leave under subsection (a)(5), any of the employee’s accrued or accumulated annual or sick leave under subchapter I. If the employee elects to substitute accumulated annual or sick leave for leave provided under subsection (a)(5), the employing agency shall not restrict or limit this substitution or impose any additional terms and conditions on such leave that are more stringent on the employee than the terms and conditions set forth in this subchapter. . (d) Notice Section 6382(e) of such title is further amended by adding at the end the following new paragraph: (3) In any case in which an employee requests leave under paragraph (5) of subsection (a), the employee shall— (A) provide the employing agency with not less than 7 days’ notice, before the date the leave is to be taken, of the employee’s intention to take leave under such paragraph; and (B) in the case of leave to be taken under subparagraph (A)(ii), make a reasonable effort to schedule the leave so as not to disrupt unduly the operations of the employer, subject to the approval of the health care provider involved (if any). . (e) Certification Section 6383(f) of such title is amended by striking 6382(a)(3) and inserting paragraph (3) or (5) of section 6382(a) .