Requirement to issue reasoned decision in the last instance

Electoral Act 1989, PART V- ELECTION PETITIONS, 31, p. 18

31Trial of petition

(1)   The Court may in its discretionadjourn the trial from time to time, but the trial shall, so far as ispracticable consistently with the interests of justice in respect of the trial,be continued from day to day on every lawful day until its conclusion.

http://legislation.to/Tonga/DATA/PRIN/1989-022/ElectoralAct1989.pdf