The General Assembly shall not establish any new county the greatest length of which shall be more than four times as long as the least central width thereof or which will leave the county or counties from which the territory is taken of a length more than four times as long as the least central width thereof. And the Governor shall not order an election upon a petition for the formation of a new county when the result of the establishment of a county pursuant to such election would be to create a new county of or reduce an old county to such an area.

The term "central width" shall be construed to mean any width not entirely within eight miles of one of the ends of the greatest length of the county.