Notwithstanding any other provision of this subsection, any service performed by an individual described under paragraph (1) as an employee of the Center is deemed to be civilian service creditable under
section 8411 of title 5 for purposes of qualifying for survivor annuities and disability benefits under subchapters IV and V of chapter 84 of such title, if such individual makes payment of an amount, determined by the Office of Personnel Management, which would have been deducted and withheld from the basic pay of such individual if such individual had been an employee subject to
section 8422 of title 5 for such period so credited, together with interest thereon.