(a)      A local jurisdiction may enact, adopt, amend, and execute a plan as provided in this article and create by ordinance a planning commission with the powers and duties set forth in this article.

      (b)      A municipal corporation may be included as part of a county plan under this article if:

            (1)      The legislative body of the municipal corporation, by a resolution directed to the legislative body of the county in which the municipal corporation is located, indicates the intention to participate in the county plan; and

            (2)      The legislative body of the county approves the resolution.