Columbia Amended Petitions ordinance (Charter § 131)

An initiative or referendum petition may be amended at any time within fourteen (14) days after the notification of insufficiency by filing a supplementary petition upon additional papers executed and filed as provided in case of an original petition. The city clerk shall, within thirty (30) days after such an amendment is filed, make examination of the amended petition; if the petition is still insufficient, the clerk shall file a certificate to that effect in the clerk's office and notify the person filing the petition of the clerk's findings, and no further action shall be had on such insufficient petition. A finding of insufficiency in a petition shall not prevent the filing of a new petition for the same purpose.