(a) For the purpose of an investigation under Section 81.061(c), the department may administer oaths, summon witnesses, and compel the attendance of a witness or the production of a document. The department may request the assistance of a county or district court to compel the attendance of a summoned witness or the production of a requested document at a hearing.
(b) A witness or deponent who is not a party and who is subpoenaed or otherwise compelled to appear at a hearing or proceeding under this section conducted outside the witness's or deponent's county of residence is entitled to a travel and per diem allowance. The executive commissioner by rule shall set the allowance in an amount not to exceed the travel and per diem allowance authorized for state employees traveling in this state on official business.