(B)
on a monthly basis—
(i)
over a period of 3 years beginning on the day after the employee’s or Member’s death; or
(ii)
over any other period established under the regulations.
Any method of payment provided for under subparagraph (B) shall be designed such that the present value of the benefits provided under such method is actuarially equivalent to the present value of a lump-sum payment under subparagraph (A).