I've found three different uses of the name CAS - (1) as an aboriginal breed, (2) as localized LGD mixes, and (3) as an FCI standard. These are used interchangeably in the research I read, but I'm trying to sort them out, so I can work with the research info.
(1) "Central Asians most likely originated more than four thousand years ago from natural selection in a geographical area between the Ural, Caspian Sea, Asia Minor, and the Northwest border of China."
(2) "This breed comprises numerous breed types. They differ in size, color, head types, and hair types....This breed bears a strong genetic similarity to other aboriginal breeds of Livestock Guardian dogs from that region such as Caucasian Shepherd (Nagazi), Kangal dog, and Akbash....These breed features, as well as different traditional names for the breed, give grounds for complications with breed standard."