At least 13 other parcels each were enclosed partly by land under the absolute jurisdiction of Panama and partly by an "Area of Civil Coordination" (housing), which under the treaty was subject to elements of both U.S. and Panamanian public law. In addition, the 1977 treaty designated numerous areas and individual facilities as "Canal Operating Areas" for joint U.S.-Panama ongoing operations by a commission. On the effective date of the treaty, many of these, including Madden Dam, became newly surrounded by the territory of Panama. Just after noon local time on 31 December 1999, all former Canal Zone parcels of all types had come under the exclusive jurisdiction of Panama.