(a) The Attorney General shall within the 60-day period allowed notify the submitting authority of a decision to interpose no objection to a submitted change affecting voting.

(b) The notification shall state that the failure of the Attorney General to object does not bar subsequent litigation to enjoin the enforcement of the change.

(c) A copy of the notification shall be sent to any party who has commented on the submission or has requested notice of the Attorney General's action thereon.