§ 22. Power to administer oaths and compel testimony. The
commissioner, a deputy commissioner, the secretary or counsel of the
department, or any other officer or employee duly authorized by the
commissioner, may administer oaths and take affidavits in relation to
any matter or proceeding in the exercise of the powers and duties of the
department under this chapter. The commissioner, or a deputy
commissioner may subpoena and require the attendance of witnesses and
the production of books, papers and documents pertaining to the
investigations and inquiries which such commissioner or deputy
commissioner is authorized to conduct, and examine them in relation to
any matter to be investigated by them and issue commissions for the
examination of witnesses who are out of the state or unable to attend or
excused from attendance.

Any person who shall wilfully testify falsely as to any material
matter pending in an investigation or proceeding under this chapter
shall be guilty of and punishable for perjury.

An officer who serves the subpoenas issued as above provided and
witnesses attending in response thereto shall be entitled to the same
fees as are allowed to officers and witnesses in civil actions in courts
of record, to be audited and paid in the same manner as other expenses
of the department.