<prompt> Ramba uchiverenga ndima iyi - Chibvumirano chacho chakataura nguva yaizoendeswa mugero wacho, zvichiita kuti Panama ipedzisire yava neminda yose nezvivako zvaiva munharaunda yacho. Mugumisiro wapedyo zvikurusa wechibvumirano ichi wakanga uri wokuti Canal Zone  <response>: , sechinhu, chakarega kuvapo pana October 1, 1979. Chikamu chokupedzisira chechibvumirano chacho chakapedzwa musi waDecember 31, 1999. Musi iwoyo, United States yakarega kudzora Panama Canal uye nzvimbo dzose dzaiva muPanama Canal Zone. 