Hawaii Revised Statutes Division 1. Government § 271-9

(1) To regulate common carriers by motor vehicle, and to that end the commission shall establish reasonable requirements with respect to continuous and adequate service, leasing of motor vehicles, uniform system of accounts, records, and reports, and preservation of records.

(2) To regulate contract carriers by motor vehicle, and to that end the commission shall establish reasonable requirements with respect to leasing of motor vehicles, uniform system of accounts, records, and reports, and preservation of records.

(3) To administer, execute, and enforce this chapter, to make all necessary orders in connection therewith, and to prescribe rules, regulations, and procedures for the administration.

(4) For purposes of the administration of this chapter, to inquire into the management of the business of motor carriers, and into the management of the business of persons controlling, controlled by, or under common control with, motor carriers to the extent that the business of these persons is related to the management of the business of one or more motor carriers, and the commission shall keep itself informed as to the manner and method in which the same are conducted, and may obtain from the carriers and persons such information as the commission deems necessary to carry out the provisions of this chapter.

(5) To investigate any person acting in the capacity of or engaging in the business of a motor carrier within the State, without having a certificate of public convenience and necessity or other authority previously obtained under and in compliance with this chapter or the rules promulgated thereunder.