(a) Every investigating committee which is authorized to exercise compulsory process may, by majority vote of all of the members of such committee, issue subpoenas and subpoenas duces tecum with reference to any matter pertinent to any subject under inquiry, study or investigation by such committee.
(b) A person subpoenaed to attend a hearing of an investigating committee shall receive the same fees and allowances as a person subpoenaed to give testimony in an action pending in a district court. Such fees and allowances shall be paid from funds appropriated for the use of the investigating committee issuing the subpoena or from funds appropriated for legislative expense. Appropriations to the division of post audit may be used for payment of such fees and allowances or other expenses of compulsory process.