Answer:
In California, a ballot proposition can be a referendum or an initiative measure that is submitted to the electorate for a direct decision or direct vote (or plebiscite). If passed, it can alter one or more of the articles of the Constitution of California, one or more of the 29 California Codes, or another law in the California Statutes by clarifying current or adding statute(s) or removing current statute(s).
Measures can be placed on the ballot either by the California State Legislature or via a petition signed by registered voters. The state legislature can place a state constitutional amendment or a proposed law change on the ballot as a referendum to be approved by voters. Under the state constitution, certain proposed changes to state laws may require mandatory referenda, and must be approved by voters before they can take effect. A measure placed on the ballot via petition can either be a vote to veto a law that has been adopted by the legislature (an optional referendum or "people's veto") or a new proposed law (initiative).
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