(October 18, 2016, 9:22 AM EDT) -- HARRISBURG, Pa. — The Marcellus Shale Coalition (MSC) on Oct. 13 filed a lawsuit in the Commonwealth Court of Pennsylvania against the Pennsylvania Department of Environmental Protection (DEP) seeking declaratory and injunctive relief, arguing that the state’s oil and gas regulations, referred to as Chapter 78, are “unlawful, illegal, void and unenforceable for various reasons” (Marcellus Shale Coalition v. Commonwealth of Pennsylvania Department of Environmental Protection, et al., No. N/A, Pa. Cmwlth.)....