1. The governing body of each city whose population is 25,000 or more and of each county whose population is 52,000 or more shall create by ordinance a planning commission to consist of seven members.
2. Cities whose population is less than 25,000 and counties whose population is less than 52,000 may create by ordinance a planning commission to consist of seven members. If the governing body of any city whose population is less than 25,000 or of any county whose population is less than 52,000 deems the creation of a planning commission unnecessary or inadvisable, the governing body may, in lieu of creating a planning commission as provided in this subsection, perform all the functions and have all of the powers which would otherwise be granted to and be performed by the planning commission.