If a function or activity is within the area of the commission’s jurisdiction and requires the securing of a permit, the commission shall exercise its power to grant or deny a permit in conformity with the provisions of this title and with any provisions of the plan pertaining to placing of fill, extraction of materials, construction methods and use or change of use of water areas, land or structures. If a function or activity is outside the area of the commission’s jurisdiction or does not require the issuance of a permit, any provisions of the plan pertaining thereto are advisory only.