A constitutional amendment's a change to the constitution of a nation or a state. In jurisdictions with "rigid" or "entrenched" constitutions, amendments require a special procedure different from that used for enacting ordinary laws. Referendum Some constitutions may only be amended with the direct consent of the electorate in a referendum. In some states a decision to submit an amendment to the electorate must first be taken by the legislature. In others a constitutional referendum may be trig… (More on Amend)