1975—Pub. L. 94–73 inserted “or whenever a State or political subdivision with respect to which the prohibitions set forth in section 1973b (a) of this title based upon determinations made under third sentence of section 1973b (b) of this title are in effect shall enact or seek to administer any voting qualification or prerequisite to voting, or standard, practice, or procedure with respect to voting different from that in force or effect on November 1, 1972,” after 1968, substituted “or upon good cause shown, to facilitate an expedited approval within sixty days after such submission, the Attorney General has affirmatively indicated that such objection will not be made. Neither an affirmative indication by the Attorney General that no objection will be made, nor the Attorney General’s failure to object,” for “except that neither the Attorney General’s failure to object”, and “on account of race or color, or in contravention of the guarantees set forth in section 1973b (f)(2) of this title” for “on account of race or color”, and inserted provisions that in the event the Attorney General affirmatively indicates that no objection will be made within the sixty-day period following receipt of a submission, the Attorney General may reserve the right to examine the submission if additional information comes to his attention during the remainder of the sixty-day period which would otherwise require objection in accordance with this section.

1970—Pub. L. 91–285 inserted “based upon determinations made under the first sentence of section 1973b (b) of this title” after “section 1973b (a) of this title” and “or whenever a State or political subdivision with respect to which the prohibitions set forth in section 1973b (a) of this title based upon determinations made under the second sentence of section 1973b (b) of this title are in effect shall enact or seek to administer any voting qualification or prerequisite to voting, or standard, practice, or procedure with respect to voting different from that in force or effect on November 1, 1968,” after “1964,”.