Today , AltaGas Ltd. and WGL Holdings, Inc. announced that they have reached a settlement in principle with key stakeholders in Washington D.C., including the Government of the District of Columbia, the Office of the People's Counsel, the Laborers' International Union of North America, its affiliated District Council, and Local Unions serving or located in Washington D.C. , the United States Department of Defense, the National Consumer Law Center/National Housing Trust-Enterprise Preservation Corporation , and the Apartment and Office Building Association. All key parties have now reached an understanding on settlement terms, clearing a path for review and approval by the Public Service Commission of the District of Columbia .