18.—(1) For the purpose of calculating any death grant under regulation E20 or supplementary death grant under regulation E21 that may become payable in respect of the person—
(a)the average salary mentioned in regulations E20(2) and E21(2)—
(i)if the grant becomes payable within 3 years after the start of new employment, is his average salary in respect of the earlier employment; and
(ii)in any other case, is his average salary in respect of new employment;
(b)the retirement lump sum mentioned in regulation E20(2) is the aggregate of the lump sums that would have become payable as there mentioned in respect of each of the employments, increased in accordance with paragraph 17; and
(c)the retirement pension mentioned in E21(3) is the aggregate of the retirement pensions paid in respect of each of the employments.
(2) Only one of either kind of grant shall be paid.