53 Pa. Stat. § 10606
Zoning ordinances enacted after the effective date of this act should reflect the policy goals of the municipality as listed in a statement of community development objectives, recognizing that circumstances can necessitate the adoption and timely pursuit of new goals and the enactment of new zoning ordinances which may neither require nor allow for the completion of a new comprehensive plan and approval of new community development objectives. This statement may be supplied by reference to the community comprehensive plan or such portions of the community comprehensive plan as may exist and be applicable or may be the statement of community development objectives provided in a statement of legislative findings of the governing body of the municipality with respect to land use; density of population; the need for housing, commerce and industry; the location and function of streets and other community facilities and utilities; the need for preserving agricultural land and protecting natural resources; and any other factors that the municipality believes relevant in describing the purposes and intent of the zoning ordinance.
53 P.S. § 10606