(B)
In the case of any employee who becomes entitled to receive compensation under subchapter
I of chapter
81 of this title because of disease or injury to the employee and has been insured under this section throughout—
(i)
the 5 years of service immediately preceding the date such employee becomes entitled to such compensation, or
(ii)
the full period or periods of service during which the employee was entitled to be insured, if less than 5 years,
the amount of optional life insurance only which has been in force throughout such period may be continued, under conditions determined by the Office, during the period the employee is receiving such compensation for disease or injury and is held by the Secretary of Labor or his delegate to be unable to return to duty.