, except that such certification may be terminated at any time upon a

.Secretary of Housing and Urban Development

)(A) Upon

, upon the request of the head of an agency, grant authority to fix the ..... the rate payable for level I of the Executive Schedule, except upon written

, except that a greater percentage may be deducted upon the written consent of

receipt requested, or by personal service, upon

referred to in paragraph (1) may be resumed upon any involuntary separation of the ..... subparagraph (A) in the case of a person who, upon separation, is entitled to ..... .(3) Upon resumption of payment ..... concerned may, upon application by the employee, pay the total amount of ..... payments of such pay would have been discontinued under subsection (d) upon

, and upon approval thereof to pay voluntary separation incentive payments to ..... ;“(D) an employee who, upon ..... ) the number of waivers made (in the repayment upon subsequent

function conferred upon the President by section 2(a) of the Special Agent

under this section shall be contingent upon the employee entering into a ..... agreement may be terminated before the agreed-upon service period has been ..... period shall commence upon the commencement of service with the agency or ..... installments, as a final lump sum upon the completion of the full period of ..... when the agreed-upon service period has not been completed