Challenge to Validity of Ordinance. As provided for herein and in accordance with the Pennsylvania Municipalities Planning Code, Section 916.1, as amended, the Board shall hear substantive challenges to this chapter, or parts hereof, or to the Zoning Map. Recognizing that challenges to the validity of an ordinance or map may present issues of fact and interpretation which may lie within the special competence of the Board and to facilitate speedy disposition of such challenges by a court, the Board may hear all challenges wherein the validity of the ordinance or map presents any issue of fact or interpretation not hitherto properly determined at a hearing before another competent agency or body and shall take evidence and make a record thereon. At the conclusion of the hearing, the Board shall decide all contested questions of interpretation and make findings on all relevant issues of fact, which shall become part of the record on appeal to court. The Board shall commence its hearings within 60 days after the request is filed, unless the landowner requests or consents to an extension of time. The Board shall determine, within 45 days from the conclusion of the last hearing, whether the challenged ordinance, or portion thereof, is defective. If the ordinance is found to be defective, the Board shall include in its decision recommendations to the Board of Township Supervisors on such revisions as would cure the defect, or the identification of such portions as need revision. In reaching its decision, the Zoning Hearing Board shall consider the amendments, plans and explanatory materials submitted by the landowner and any other party to the issue plus the following criteria:
(1) Impact of the proposal upon roads, sewer facilities, water supplies, schools and other public services and facilities.
(2) Impact upon regional housing needs and the effectiveness of the proposal in providing affordable housing for classes of persons otherwise unlawfully excluded by the challenged provisions of the ordinance or map.
(3) Suitability of the site for the intensity of use proposed in view of the site's soils, slopes, woodlands, wetlands, floodplains, aquifers, natural resources and other natural features.
(4) Impact of the proposed use on the site's soils, slopes, woodlands, wetlands, floodplains, aquifers, natural resources and other natural features as well as the degree to which they are protected or destroyed, the tolerance of the resources to development, plus any adverse environmental impacts.
(5) Impact of the proposal on the preservation of agriculture and any other land uses which are essential to public health and welfare.