(a) Conduct public hearings.
(b) Issue subpoenas for the attendance of witnesses and the production of books, records and documents relating to matters before the commission.
(c) Administer oaths.
(d) Take or cause to be taken depositions and receive such pertinent and relevant proof as may be considered necessary or proper to carry out duties of the commission and Water Resources Department under ORS 196.600 to 196.921, 541.010 to 541.320, 541.386, 541.430 to 541.545 and 541.700 to 541.990 and ORS chapters 536 to 540, 542 and 543.
(2) Subpoenas authorized by this section may be served by any person authorized by the person issuing the subpoena. Witnesses who are subpoenaed shall receive the fees and mileage provided in ORS 44.415 (2). [Formerly 536.029]