Agencies shall implement internal procedures to insure that they will make payment to vendors or employees within forty-five (45) days of receipt of a proper invoice or proper claim. If an agency fails to make payment within the forty-five (45) days, the vendor or employee shall be entitled to claim interest.
Okla. Admin. Code § 260:10-3-1
Amended at 30 Ok Reg 1112, eff 7-1-13