Okla. Stat. tit. 74, § 74-291.1: Legislators - Per diem

Members of the Legislature shall be allowed a per diem in lieu

of expenses in an amount authorized by the provisions of the

Internal Revenue Code of 1986, as amended, for deductibility of

expenses for travel while away from home without additional

documentation for each night spent away from home in the performance

of their official duties within the state during regular and

extraordinary legislative sessions, not to exceed the number of

legislative days per week.