Section 7. All decisions of the secretary of state in the petition process are subject to review by the supreme court in the exercise of original jurisdiction. A proceeding to review a decision of the secretary of state must be filed with the supreme court no later than seventy- five days before the date of the statewide election at which the measure is to be voted upon. If the decision of the secretary of state is being reviewed at the time the ballot is prepared, the secretary of state shall place the measure on the ballot and no court action shall invalidate the measure if it is approved at the election by a majority of the votes cast thereon.