Material changes in use.
When a structure, building or parcel changes in use, the owner shall be responsible for submitting the proposed change to the Director for a determination pursuant to § 106-8 whether the proposed change is material. (See the definition of "material change" of use in § 106-6.)

Material misrepresentations.
Any determination or notice of decision issued under this code shall be void if it is based upon or is granted in reliance upon any material misrepresentation or failure to make a material fact or circumstance known.