to vote of any person shall not be denied or abridged because the person failed to comply with any change made by a State or political subdivision if the State or political subdivision involved did not meet the applicable requirements of this section with respect to the change. (f) Definitions In this section— (1) the term demographic group means each group which section 2 protects from the denial or abridgement of the right to vote on account of race or color, or in contravention of the guarantees set forth in section 4(f)(2)