If the application is request to modify the text of the zoning code or to change the zoning of all or a portion of the city and the applicant/s is not the owner or owners of the affected parcels, the matter shall be within the jurisdiction of the planning commission. If the application relates to a request to rezone a specific parcel or parcels of land and is submitted by the owner or owners of the affected parcel, the matter shall be within the jurisdiction of the hearing examiner. The Montesano planning commission or examiner, as the case may be, shall conduct a public hearing on the application. The hearing shall be conducted as provided in Section 17.56.110. At the hearing, members of the Montesano planning commission or the examiner, as the case may be, may request such additional information as is reasonably necessary to evaluate the application.