Who has ample powers under Article 324(1) to make appropriate orders so as to the conduct of Elections, e.g., cancellation of poll and ordering to poll according to exigencies in particular areas, introduction of electronic voting machines, postponing of election, etc.?

Article 324(1) vests in the Election Commission the superintendence, direction, and control of elections. This includes ample powers to make appropriate orders for conducting elections, such as canceling polls in specific areas, introducing EVMs, postponing elections due to emergencies, and other exigent measures. Regional Commissioners and other officers work under EC's direction.