In this zoning appeal out of Montgomery County, the Commonwealth Court addressed whether, under the Municipalities Planning Code (“MPC”) the filing of a mandatory sketch plan created a vested right such that any future zoning applications had to be reviewed under the zoning ordinance in effect when the sketch plan was filed. In affirming the trial court’s decision, the Commonwealth Court concluded the MPC created a vested right which applied to both the then existing subdivision and land development ordinance (“SALDO”) and zoning ordinance.