Okla. Stat. tit. 62 § 880
After the adoption by the governing body of a project plan which contains the provisions required by Section 5 of this act, the clerk of the municipality or county shall transmit a copy of the description of the land within the district, a copy of the ordinance or resolution adopting the project plan, and a map or plat indicating the boundaries of the district, to the clerk, assessor, and treasurer of the county in which the district is located and to the governing bodies of any taxing subdivision which levy taxes upon any property in the district. Such documents shall be transmitted as promptly as practicable following the adoption or modification of the project plan, but in any event, on or before January 1 of the year following the adoption or modification of the project plan.
Okla. Stat. tit. 62, § 880