Okla. Stat. tit. 18, § 18-441-703: Duration of marketing contract

DURATION OF MARKETING CONTRACT. The initial duration of a

marketing contract may not exceed ten (10) years, but the contract

may be self-renewing for additional periods not exceeding five (5)

years each. Unless the contract provides for another manner or time

for termination, either party may terminate the contract by giving

notice in a record at least ninety (90) days before the end of the

current term.