If the annuitant is receiving a reduced annuity as provided in section
8339
(j) or section
8339
(k)(2) of this title, the increase in annuity payable under subparagraph (A) of this subsection is reduced by 10 percent and the survivor annuity payable under section
8341
(b) of this title is increased by 55 percent of the increase in annuity payable under such subparagraph (A), unless, at the time of claiming the increase payable under such subparagraph (A), the annuitant notifies the Office of Personnel Management in writing that he does not desire the survivor annuity to be increased. If the annuitant dies while still reemployed, the survivor annuity payable is increased as though the reemployment had otherwise terminated. If the described employment of the annuitant continues for at least 5 years, or the equivalent of 5 years in the case of part-time employment, he may elect, instead of the benefit provided by subparagraph (A) of this subsection, to deposit in the Fund (to the extent deposits or deductions have not otherwise been made) an amount computed under section
8334
(c) of this title covering that employment and have his rights redetermined under this subchapter. If the annuitant dies while still reemployed and the described employment had continued for at least 5 years, or the equivalent of 5 years in the case of part-time employment, the person entitled to survivor annuity under section
8341
(b) of this title may elect to deposit in the Fund and have his rights redetermined under this subchapter.