The Office of Personnel Management shall accept the certification of the Secretary of Agriculture or his designee concerning service for the purpose of this subchapter of the type performed by an employee named by paragraph (3) of this subsection. The Office of Personnel Management shall accept the certification of the Secretary of Commerce or his designee concerning service for the purpose of this subchapter of the type performed by an employee named by paragraph (14) of this subsection. The Office of Personnel Management shall accept the certification of the Capitol Guide Board concerning service for the purpose of this subchapter of the type described in paragraph (8) of this subsection and performed by an employee. The Office of Personnel Management shall accept the certification of the Chief Administrative Officer of the House of Representatives concerning service for the purpose of this subchapter of the type described in paragraph (13) of this subsection. For the purpose of paragraph (5) of this subsection—
(B)
the period of an individual’s service as a volunteer or volunteer leader under chapter
34 of title
22 is the period between enrollment as a volunteer or volunteer leader and the termination of that service by the President or by death or resignation.
The Office of Personnel Management shall accept the certification of the Executive Director of the Board for International Broadcasting, and the Secretary of State with respect to the Asia Foundation and the Secretary of Defense with respect to the Armed Forces Network, Europe (AFN–E), concerning services for the purposes of this subchapter of the type described in paragraph (11) of this subsection. For the purpose of this subchapter, service of the type described in paragraph (15) of this subsection shall be considered Member service. The Office of Personnel Management shall accept, for the purposes of this subchapter, the certification of the head of a nonappropriated fund instrumentality of the United States concerning service of the type described in paragraph (16) or (17) of this subsection which was performed for such appropriated fund instrumentality. Service credited under paragraph (17) may not also be credited under any other retirement system provided for employees paid from nonappropriated funds of a nonappropriated fund instrumentality.