system has been critiqued, as in some cases stockholders have sold land to outside corporations that have leveled forests and extracted minerals. But supporters of the system argue that it has provided economic benefits for indigenous peoples that outweigh these problems. Selected provisions of ANCSA Native claims in Alaska were extinguished by means of section 4 of ANCSA. In exchange for abrogating Native claims, approximately one-ninth of the state's land plus $962.5 million were distributed to more than 200 local Alaska Native "village corporations" established under section 8, in addition to 12 land-owning for-profit Alaska Native "regional corporations" and a non-land-owning thirteenth corporation for Alaska Natives who had left the state established under section 6. Of the compensation monies, $462.5 million was to come from the federal treasury and the rest from oil revenue-sharing. Settlement benefits would accrue to those with at least one-fourth Native ancestry under sections 3(b) and 5(a). Of the approximately 80,000 Natives enrolled under ANCSA, those living in villages (approximately two-thirds of the total) would receive 100 shares in both a village and a regional corporation. The remaining one-third would be "at large" shareholders with 100 shares in a regional corporation with additional rights to revenue from regional mineral and timber resources. The Alaska Native Allotment Act was revoked but with the proviso that pending claims under that act would continue to be processed under section 18. Successful applicants would be excluded under ANCSA by section 14(h)(5) from land to be used for a primary residence. The twelve regional corporations within the state would administer the settlement. A thirteenth corporation composed of Natives who had left the state would receive compensation but not land. Surface rights to were patented to the Native village and regional corporations under sections 12(c), as well as 14(h)(1) and (8). The surface rights to the patented land were granted to the village corporations and the subsurface right to the land were granted to the regional corporation, creating a split estate pursuant to section 14(f). Alaska Native regional corporations The following thirteen regional corporations were created under ANCSA: Ahtna, Incorporated The Aleut Corporation Arctic Slope Regional Corporation Bering Straits Native Corporation Bristol Bay Native Corporation Calista Corporation Chugach Alaska Corporation Cook Inlet Region, Inc. Doyon, Limited Koniag, Incorporated NANA Regional Corporation Sealaska Corporation The 13th Regional Corporation Additionally, most regions and some villages have created their own nonprofits providing social services and