Columbia Initiative ordinance (Charter § 127)

The voters shall have power to propose any ordinance, except an ordinance appropriating money or authorizing the levy of taxes, and to adopt or reject the same at the polls, such power being known as the initiative. Any initiated ordinance may be submitted to the council by a petition signed by registered voters of the city equal in number to at least twenty (20) per cent of the number of votes cast for council member-at-large at the last regular municipal election, provided, that there be not less than four hundred (400) signatures.