(A)
An employee whose additional optional insurance under this section would otherwise stop in accordance with paragraph (1) and who is not eligible to continue insurance under paragraph (2) may elect, under conditions prescribed by the Office of Personnel Management, to continue all or a portion of so much of the additional optional insurance as has been in force for not less than—
(i)
the 5 years of service immediately preceding the date of the event which would cause insurance to stop under paragraph (1); or
(ii)
the full period or periods of service during which the insurance was available to the employee, if fewer than 5 years,
at group rates established for purposes of this section, in lieu of conversion to an individual policy. The amount of insurance continued under this paragraph shall be reduced by 50 percent effective at the beginning of the second calendar month after the date the employee or former employee attains age 70 and shall stop at the beginning of the second calendar month after attainment of age 80, subject to a provision for temporary extension of life insurance coverage and for conversion to an individual policy of life insurance under conditions approved by the Office. Alternatively, insurance continued under this paragraph may be reduced or stopped at any time the employee or former employee elects.