reg R10 Polygamous marriages
(1) If a member dies without leaving a widow or widower but the member was at the date of death married to a spouse under a law which permits polygamy any benefits that would be payable to the member’s widow or widower shall be payable to that spouse, or where there is more than one, to those spouses in equal shares. (2) The shares will be calculated as at the date the member dies. (3) A spouse’s share of a pension will not be increased on the death of any other spouse.