Every locality shall by resolution or ordinance create a local planning commission in order to promote the orderly development of the locality and its environs. In accomplishing the objectives of § 15.2-2200 the local planning commissions shall serve primarily in an advisory capacity to the governing bodies. Any locality may participate in a planning district commission in accordance with Chapter 42 (§ 15.2-4200 et seq.) of this title or a joint local commission in accordance with § 15.2-2219.