(1) The brothers and sisters of each of an intestate's parents are entitled to the whole of the intestate estate if the intestate leaves--(a) no spouse, and(b) no issue, and(c) no parent, and(d) no brother or sister, or issue of a deceased brother or sister, and(e) no grandparent.
(2) If no brother or sister of a parent of the intestate predeceased the intestate leaving a child who survived the intestate, then--(a) if only one survives--the entitlement vests in the surviving brother or sister, or(b) if 2 or more survive--the entitlement vests in them in equal shares.
(3) If a brother or sister of a parent of the intestate predeceased the intestate leaving a child who survived the intestate, the child is entitled to the deceased parent's presumptive share and, if there are 2 or more children, they share equally.