WixSite has part of a 1976 regulation in a linked word document. The “WILDLIFE RESERVES (AMENDMENT) (DECLARATION OF GAME RESERVES) REGULATIONS, 1976” indicates everything north of the river is Nini-Shuhien National Park. Anything south of the river is Ankasa Game Production Reserve.
Current geometry is probably generally for the “Ankasa Conservation Area”, which contains the Nini Shuhien National Park and the Ankasa Game Production Reserve.
Geometry for the individual components of this area appears to be missing