Appeals and interpretations: to hear and decide appeals where it is alleged there is an error in any order, requirement, decision or determination made by an administrative official in the enforcement of this chapter. To interpret upon the words, terms, rules, regulations, provisions and restrictions of this chapter, where there is doubt as to the meaning thereof, including determination in specific instances whether questionable uses are permitted by virtue of being similar to, or customarily incidental to, permitted uses as provided by this chapter.