Keep with an agent on this one. All permits are valid for 72 hours beyond the scheduled date of departure, so you’ll have flexibility. American Flight Support will be able to assist.
The CAA has after-hours contacts for emergencies, use flightbriefing@caaz.co.zw / +263 4 585006 during nights and weekends.
Private flights carrying less than seven passengers do not need a permit to land or overfly, just file the flight plan. Seven or more passengers – you’ll need a permit.