Requirement to issue reasoned decision in the last instance

Electoral Act 2006, 104

(1) At the conclusionof the trial of an election petition, the High Court shall determine whetherthe respondent, or any other, and which, person, was duly elected, or whetherthe election to which the election petition relates was void, and the Registrarshall as soon as may be, submit a copy of such determination to the Speaker ofthe National Assembly and to the Commission.

http://aceproject.org/regions-en/eisa/ZM/Electoral%20%20Act%202006.pdf