Iowa Code § 372.10: Contents of charter.

A home rule charter must contain provisions for:

1. A council of an odd number of members, not less than five.

2. A mayor, who may be one of those council members.

3. Two-year or staggered four-year terms of office for the mayor and council members.

4. The powers and duties of the mayor and the council, consistent with the provisions of the city code.

5. A council representation plan pursuant to section 372.13, subsection 11.