(a) The governor shall order:
(1) each general election for officers of the state government, members of the United States Congress, and electors for president and vice-president of the United States;
(2) each election on a proposed constitutional amendment; and
(3) each special election to fill a vacancy in the legislature or in congress.
(b) The order shall be made by proclamation.
(c) Not later than the 36th day before election day, a copy of the proclamation ordering an election shall be mailed to the county judge of each county wholly or partly in the territory covered by the election.