If an annuitant, except a disability annuitant whose annuity is terminated because of the annuitant’s recovery or restoration of earning capacity, becomes employed in an appointive or elective position, an amount equal to the annuity allocable to the period of actual employment shall be deducted from the annuitant’s pay, except for lump-sum leave payment purposes under section 5551. Unless the annuitant’s appointment is on an intermittent basis or is to a position as a justice or judge (as defined by
section 451 of title 28) or as an employee subject to another retirement system for Government employees, or unless the annuitant is serving as President, deductions for the Fund shall be withheld from the annuitant’s pay under section 8422(a) and contributions under section 8423 shall be made. The deductions and contributions referred to in the preceding provisions of this subsection shall be deposited in the Treasury of the United States to the credit of the Fund. The annuitant’s lump-sum credit may not be reduced by annuity paid during the reemployment.