the President may delegate, in whole or in part, authority for personnel management functions, including authority for competitive examinations, to the Director of the Office of Personnel Management; and

the Director may delegate, in whole or in part, any function vested in or delegated to the Director, including authority for competitive examinations (except competitive examinations for administrative law judges appointed under section 3105 of this title, the cost of which examinations shall be reimbursed by payments from the agencies employing such judges to the revolving fund established under section 1304(e)), to the heads of agencies in the executive branch and other agencies employing persons in the competitive service.

The Office shall establish standards which shall apply to the activities of the Office or any other agency under authority delegated under subsection (a) of this section.

The Office shall establish and maintain an oversight program to ensure that activities under any authority delegated under subsection (a) of this section are in accordance with the merit system principles and the standards established under paragraph (1) of this subsection.

Nothing in subsection (a) of this section shall be construed as affecting the responsibility of the Director to prescribe regulations and to ensure compliance with the civil service laws, rules, and regulations.

At the request of the head of an agency to whom a function has been delegated under subsection (a)(2), the Office may provide assistance to the agency in performing such function. Such assistance shall, to the extent determined appropriate by the Director of the Office, be performed on a reimbursable basis through the revolving fund established under section 1304(e).