Okla. Stat. tit. 28, § 84.1
Any employee of the state or any political subdivision thereof who is subpoenaed as a witness to testify on any matter pertaining to their employment, including any investigation conducted by the employee as a duty of said employment for which he is fully compensated, shall not be entitled to receive the witness fee and reimbursement for mileage provided for in Section 81 of this title. However, if the employee is required by the subpoena to testify in a county other than his county of residence or employment, he shall be entitled to receive reimbursement pursuant to the State Travel Reimbursement Act in accordance with Section 82 of this title. No such witness shall receive such reimbursement in more than one case covering the same period of time or the same travel. Each such witness shall be required to make oath that the amounts claimed for reimbursement have not been claimed or received in any other case or from any other source.
Added by Laws 1984, HB 1836, c. 92, § 1, emerg. eff. July 1, 1984; Amended by Laws 1985, HB 1265, c. 166, § 5, emerg. eff. July 1, 1985; Amended by Laws 2005, SB 296, c. 192, § 2, eff. November 1, 2005 (superseded document available).