Section 29.10.030 - Initiative and referendum(a) A home rule charter shall provide procedures for initiative and referendum.(b) A charter may not require an initiative or referendum petition to have a number of signatures greater than 25 percent of the total votes cast in the municipality at the last regular election.(c) A charter may not permit the initiative and referendum to be used for a purpose prohibited by art. XI, Sec. 7 of the state constitution.