20 C.F.R. § 416.1228

Exclusion of Alaskan natives' stock in regional or village corporations.

        (a) In determining the resources of a native of Alaska (and spouse, if any) there will be excluded from resources, shares of stock held in a regional or village corporation during the period of 20 years in which such stock is inalienable, as provided by sections 7(h) and 8(c) of the Alaska Native Claims Settlement Act (43 U.S.C. 1606, 1607). The 20-year period of inalienability terminates on January 1, 1992.

            (b) As used in this section,
            native of Alaska
             has the same meaning as that contained in section 3(b) of the Alaska Native Claims Settlement Act (43 U.S.C. 1602(b)).

Official source