individual members. (iii) Significant rates of informal social interaction which exist broadly among the members of a group. (iv) A significant degree of shared or cooperative labor or other economic activity among the membership. (v) Evidence of strong patterns of discrimination or other social distinctions by nonmembers. (vi) Shared sacred or secular ritual activity encompassing most of the group. (vii) Cultural patterns shared among a significant portion of the group that are different from those of the non-Indian populations with whom it interacts. These patterns must function as more than a symbolic identification of the group as Indian. They may include, but are not limited to, language, kinship organization, or religious beliefs and practices. (viii) The persistence of a named, collective Indian identity continuously over a period of more than 50 years, notwithstanding changes in name. (ix) A demonstration of historical political influence under the criterion in paragraph (3) shall be evidence for demonstrating historical community. (B) A petitioner shall be considered to have provided sufficient evidence of community at a given point in time if evidence is provided to demonstrate any one of the following: (i) More than 50 percent of the members reside in a geographical area exclusively or almost exclusively composed of members of the group, and the balance of the group maintains consistent interaction with some members of the community. (ii) At least 50 percent of the marriages in the group are between members of the group. (iii) At least 50 percent of the group members maintain distinct cultural patterns such as, but not limited to, language, kinship organization, or religious beliefs and practices. (iv) There are distinct community social institutions encompassing most of the members, such as kinship organizations, formal or informal economic cooperation, or religious organizations. (v) The group has met the criterion in paragraph (3) using evidence described in paragraph (3)(B). (3) The petitioner has