State officers; authorizing per diem in lieu of expenses for certain state officers; effective date.

HB 2889 amends Oklahoma law to establish per diem allowances and mileage reimbursement rules for certain state officers. It authorizes a daily per diem (based on IRS guidelines) for officers traveling for official duties away from home, excluding those provided state housing. The bill also allows mileage reimbursement for vehicle use under specific conditions, while prohibiting both per diem and mileage for campaign activities. These changes apply to state officers listed in Section 250.4 of Oklahoma law and take effect November 1, 2025.