875—150.9 (91C) Investigations and complaints.
	 150.9(1) Investigations. Investigations may take many forms to determine if there is compliance with the law. Investigations shall take place at the times and in the places as the commissioner may direct. The commissioner may interview persons at the work site and utilize other reasonable investigatory techniques. The conduct of the investigation shall be such as to preclude unreasonable disruption of the operations of the work site. Investigations may be conducted without prior notice by correspondence, telephone conversations, or review of materials submitted to the division. At the initiation of an investigation at the contractor’s establishment, the investigator shall present credentials, explain the nature and purpose of the investigation, and seek the consent of the owner, operator or agent in charge of the establishment. In the event the investigator is not permitted to fully conduct an investigation, the commissioner may seek an administrative warrant, if necessary.
	 150.9(2) Complaints. Complaints in which the complainant provides a name and address made to the commissioner in writing shall receive a written response as to the results of the investigation. A complainant’s name and other identifying information shall not be released if the complaint was included as a part of another complaint where the complainant’s identity would be protected under other statutes or rules (i.e., a complaint filed under both Iowa Code chapters 88 and 91C).