At least 30 days before issuing a certificate of convenience and necessity, the commission shall hold a public hearing on the application. Copies of the completed application shall be made available to the public at least 10 days before the public hearing date. A transcript of the public hearing shall be included in the permanent record of agency action on that application, and copies of the public hearing transcripts shall be available to the public. The commission may, without notice of hearing and pending the determination of an application for a certificate, issue a temporary certificate in cases of emergency, to assure maintenance of adequate service or to serve particular customers, and may by regulation exempt from the requirements of this section temporary acts or operations for which the issuance of a certificate will not be required in the public interest.