28.1(3)If the Commission processes a conduct complaint or takes over from a chief of police the processing of a conduct complaint under section 26.1, it shall, within 30 days after the filing of the complaint, appoint as an investigator a police officer of another police force who is of a higher rank than the police officer being investigated, or, within 30 days after the filing of the complaint, appoint an investigator from the list it establishes and maintains under section 26.2.