“Administering oaths or affirmations to witnesses. The President of the Senate, the Speaker of the House of Representatives, the chairperson or vice chairperson of any statutory, standing, special or interim committee of either house of the Legislative Assembly, or the chairperson or vice chairperson of a statutory, standing, special or interim joint committee of the two houses, may administer oaths or affirmations to witnesses in any proceedings under their examination” (ORS 171.505).
“Legislative process to compel attendance and production of papers; service. (1) The President of the Senate, the Speaker of the House of Representatives, or the chairperson or vice chairperson of any of the legislative committees referred to in ORS 171.505 upon a majority vote of any such committee, may issue any processes necessary to compel the attendance of witnesses and the production of any books, papers, records or documents as may be required” (ORS 171.510).