Where the Board of Commissioners, in this chapter, has stated special exceptions to be granted or denied by the Zoning Hearing Board pursuant to express standards and criteria, the Board shall hear and decide requests for such special exceptions in accordance with such standards and criteria. In granting a special exception, the Board may attach such reasonable conditions and safeguards, in addition to those expressed in this chapter, as it may deem necessary to implement the purposes of this chapter and the Pennsylvania Municipalities Planning Code, 53 P.S. § 10101 et seq.