Ingeniso yempahla ephumayo, ekwabizwa ngokuba sisibhengezo esisemthethweni esinikezelwa ngumthengisi onelayisenisi yempahla ephumayo kuGunyaziwe weCustoms wengingqi wothutho lwempahla kumazwe angaphandle kunye nokuthumela ngaphandle. Isiteyitimenti sokungeniswa kwezithethe siqulethe ulwazi olunzulu malunga nempahla evela ngaphandle. Ngokuqhelekileyo, kubarhwebi abavela kumazwe angaphandle, abasebenza kunye nomthengisi wempahla, lo uya kuzalisa ifomu egameni lomrhwebi.
