In the case of a vacancy in the representation of this State in the United States Senate, the writ may designate the next general election day for the election, but if a special day is designated, it shall specify the cause and purpose of such election, the name of the officer in whose office the vacancy has occurred, the day on which a special primary election shall be held, which shall be not less than 70 days nor more than 76 days following the date of issuance of the writ, and the day on which the special election shall be held, which shall be not less than 64 nor more than 70 days following the day of the special primary election.
If the vacancy happens in the representation of this State in the United States Senate the election shall take place at the general election next succeeding the happening thereof, unless the vacancy shall happen within 70 days next preceding the primary election prior to the general election, in which case it shall be filled by election at the second succeeding election, unless the Governor shall deem it advisable to call a special election therefor, which he is authorized hereby to do.