The treaty laid out a timetable for the transfer of the canal, leading to a complete handover of all lands and buildings in the canal area to Panama. The most immediate consequence of this treaty was that the Canal Zone, as an entity, ceased to exist on October 1, 1979. The final phase of the treaty was completed on December 31, 1999. On this date, the United States relinquished control of the Panama Canal and all areas in what had been the Panama Canal Zone.