Minn. Stat. § 237.15
The department shall whenever it deems the same necessary determine the value of all the property of any telephone company devoted to the public use, and in so doing it shall, after notice to the telephone company, hold such public hearing as will give all interested parties a chance to furnish evidence and be heard. For the purpose of this chapter the department is authorized to appoint engineers, examiners, experts, clerks, accountants, and other assistants as it may deem necessary at such rates of compensation as it may prescribe.
In the discharge of their duties such appointees shall have every power, of any inquisitorial nature granted in this chapter to the department. The department may conduct any number of investigations contemporaneously through its individual members or appointees, and may delegate to its individual members and employees the taking of all testimony on any investigation or hearing.
Minn. Stat. § 237.15
(5298) 1915 c 152 s 12; 1919 c 183 s 3; 1971 c 25 s 67