Any condition imposed must be related to the purpose of this chapter, must be based on substantial evidence, must be reasonable and, to the extent practicable, measurable, and may include conditions such as the special exception's duration, transfer and renewal. The applicant must demonstrate that the application and all requirements and conditions established by the Board of Zoning Appeals relating to the special exception are or shall be satisfied, both of which must be supported by substantial evidence. The Board of Zoning Appeals' decision to approve or deny a special exception must be supported by substantial evidence.