Last but not least, a successful system of election dispute resolution relies on the effectiveness of the decision-making powerof the competent body. Electoral management bodies, courts or other relevant bodies responsible for validating elections and announcing election results have to take decisions even in sensitive cases, which includes inter alia the delicate issue of cancellation of elections. The report will develop in its Part IX the various existing systems of decision-making, and in particular the possibility to partially or fully cancel elections.