A Commonwealth Court judge has barred industry groups, drillers and legislators from intervening in a suit filed by seven Pennsylvania municipalities and the Delaware Riverkeeper Network that alleges the recent zoning-related amendments to the state’s Oil and Gas Act are unconstitutional.

Keith B. Quigley, a visiting judge on the Commonwealth Court, wrote in a 13-page opinion and order issued Friday afternoon in Robinson Township v. Commonwealth that the oil and gas industry’s interests should not be a factor in the case.