; or (ii) a single language minority group represents 20 percent or more of the voting-age population on Indian lands located in whole or in part in the political subdivision; or (B) to convert one or more seats elected from a single-member district to one or more at-large seats or seats from a multimember district in a State or political subdivision where— (i) 2 or more racial groups or language minority groups each represent 20 percent or more of the political subdivision’s voting-age population; or (ii) a single language minority group represents 20 percent or more of the voting-age population on Indian lands located in whole or in part in the political subdivision. (2) Changes to jurisdiction boundaries Any change or series of changes within a year to the boundaries of a jurisdiction that reduces by 3 or more percentage points the proportion of the jurisdiction's voting-age population that is comprised of members of a single racial group or language minority group in a State or political subdivision where— (A) 2 or more racial groups or language minority groups each represent 20 percent or more of the political subdivision’s voting-age population; or (B) a single language minority group represents 20 percent or more of the voting-age population on Indian lands located in whole or in part in the political subdivision. (3) Changes through redistricting Any change to the boundaries of election districts in a State or political subdivision where any racial group or language minority group experiences a population increase, over the preceding decade (as calculated by the Bureau of the Census under the most recent decennial census), of at least— (A) 10,000