If there is a question as to whether a proposed use is one of the defined uses set forth in this chapter, or if a proposed use may be reasonably described by more than one of the defined uses set forth in this chapter, the Planning Board, upon written application, shall render a formal determination as to the proper definition of the proposed use in question. Once the Planning Board has determined the proper definition of the proposed use, the requirements of this chapter will determine if the proposed use is a permitted use, a permitted accessory use, a special permit use, or a prohibited use. The authority granted to the Planning Board under this § 345-11B shall not permit the Planning Board to allow, by special permit or otherwise, any use prohibited by § 345-11C or by § 345-38.