It seems the door *does* swing both ways when it comes to Pennsylvania municipalities and the Act 13 lawsuit decision that allows municipalities to have a say in zoning in, or zoning out, shale drilling. In 2013 seven selfish PA towns won the right, from the PA Supreme Court, to impose their own zoning rules on oil and gas drilling (see PA Supreme Court Rules Against State/Drillers in Act 13 Case). Since that time, Big Green groups have asked the court to rule the door only swings one way–that zoning can keep shale drilling out, but never allow *more* of it. That notion has now been put to rest. The door swings both ways.