Rule 64 governs the review of judgments, final orders or resolutions of the COMELEC and COA. The phrase “decision, order, or ruling of constitutional commissions” that may be brought directly to the Supreme Court on certiorari is not all-encompassing; it only relates to those rendered in the COMELEC and COA's exercise of adjudicatory or quasi-judicial powers.
Rule 64 excludes the review of judgments of Civil Service Commission.
