to exercise exclusive jurisdictions over all contests relating to the elections, returns, and qualifications of all elective regional, provincial and city officials and appellate jurisdiction over all contests involving all municipal officials decided by trial courts of general jurisdiction;
to decide, except those involving the right to vote, all questions affecting elections, including determination of the number and location of polling places, appointment of election officials and inspectors, and registration of voters;
to file petitions in court for inclusion or exclusion of voters; and
to investigate and, where appropriate, prosecute cases of violations of election laws, including acts or omissions constituting election fraud, offenses and malpractices.
To enforce and administer all laws and regulations relative to the conduct of and elections, plebiscites, initiatives, referendum, and recalls.