2. Participation in a charter commission under this chapter may be proposed by:
- a. The city council adopting a resolution calling for participation.
- b. By petition of the number of eligible electors of the city equal to at least twenty-five percent of the votes cast in the city at the last regular city election petitioning the council to adopt a resolution calling for participation. The council shall within thirty days of the filing of a valid petition adopt such a resolution.