In reviewing the concept plan and the final development plan, the reviewing board shall apply the general requirements set forth in this article, as well as Article 4 of this chapter and the standards for the underlying district set forth in Article 5, unless the reviewing board, subject to final Town Board approval, determines that alteration of those standards in the context of the PUD would better protect the public health, safety and general welfare and carry out the purposes of the Comprehensive Plan of the Town and the Greenway Connections.