5 U.S.C. § 6383 - U.S. Code - Unannotated Title 5. Government Organization and Employees § 6383. Certification

(1) the date on which the serious health condition commenced;

(2) the probable duration of the condition;

(3) the appropriate medical facts within the knowledge of the health care provider regarding the condition;

(5) in the case of certification for intermittent leave, or leave on a reduced leave schedule, for planned medical treatment, the dates on which such treatment is expected to be given and the duration of such treatment.

(c)(1) In any case in which the employing agency has reason to doubt the validity of the certification provided under subsection (a) for leave under subparagraph (C) or (D) of section 6382(a)(1), the employing agency may require, at the expense of the agency, that the employee obtain the opinion of a second health care provider designated or approved by the employing agency concerning any information certified under subsection (b) for such leave.

(2) Any health care provider designated or approved under paragraph (1) shall not be employed on a regular basis by the employing agency.

(d)(1) In any case in which the second opinion described in subsection (c) differs from the original certification provided under subsection (a), the employing agency may require, at the expense of the agency, that the employee obtain the opinion of a third health care provider designated or approved jointly by the employing agency and the employee concerning the information certified under subsection (b).

(2) The opinion of the third health care provider concerning the information certified under subsection (b) shall be considered to be final and shall be binding on the employing agency and the employee.