<prompt> Bhala okuqhubekayo kwalesi sigaba - Lesi sivumelwano sakha isimiso sesikhathi sokudluliselwa komsele, okwaholela ekudluliselweni okuphelele kwazo zonke izindawo nezakhiwo endaweni yomsele ePanama. Umphumela osheshayo walesi sivumelwano kwaba ukuthi iCanal Zone  <response>: , njengenhlangano, yayeka ukuba khona ngo-October 1, 1979. Isigaba sokugcina salesi sivumelwano saphothulwa ngo-December 31, 1999. Ngalolu suku, i - United States yayeka ukulawula uMsele WasePanama nazo zonke izindawo ezaziyiPanama Canal Zone. 