All citizens of the United States (not laboring under the disabilities named in this constitution) of the age of eighteen years and upwards, who shall have actually, and not constructively, resided in the state six months, and in the district or county thirty days next preceding any election, shall be entitled to vote for all officers that now or hereafter may be elected by the people, and upon all questions submitted to the electors at such election; provided, that no person who has been or may be convicted of treason or felony in any state or territory of the United States, unless restored to civil rights, and no person who has been adjudicated mentally incompetent, unless restored to legal capacity, shall be entitled to the privilege of an elector. There shall be no denial of the elective franchise at any election on account of sex. The legislature may provide by law the conditions under which a citizen of the United States who does not have the status of an elector in another state and who does not meet the residence requirements of this section may vote in this state for President and Vice President of the United States.