Section 18. Rules of Procedure. —

1. The Office of the Ombudsman shall promulgate its rules of procedure for the effective exercise or performance of its powers, functions, and duties.

2. The rules of procedure shall include a provision whereby the Rules of Court are made suppletory.

3. The rules shall take effect after fifteen (15) days following the completion of their publication in the Official Gazette or in three (3) newspapers of general circulation in the Philippines, one of which is printed in the national language.