Optional referendum

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The optional referendum is a referendum which comes from a request by governmental authorities or the public. The best known types of optional referendums is the popular initiative to request a law, and the popular (or abrogative) referendum to repeal a law. The collection of signatures from the public is normally necessary to organize an optional referendum, but some jurisdictions allow government agencies to request for a referendum also. It is a form of direct democracy.

The optional referendum is in contrast to a mandatory referendum in that it is a requested referendum, whereas the subject matter of a mandatory referendum is a legally required to be put to a referendum.