No ex-post facto law, or law impairing the obligation of contracts shall ever be passed, nor shall any law be passed, the taking effect of which shall be made to depend upon any authority, except as provided in this Constitution; provided, that laws locating the Capitol of the State, locating County Seats, and submitting town, and corporate acts, and other local, and Special laws may take effect, or not, upon a vote of the electors interested.-