Okla. Stat. tit. 36, § 36-6401: Insurance coverage to be provided for certain persons

As a condition of doing business in the State of Oklahoma, any

insurer duly licensed in Oklahoma and who, on the effective date of

this act, is writing custom harvesting insurance in any state in the

United States or who has written such insurance in the State of

Oklahoma within the past three (3) years shall provide such

insurance to those custom harvesters who are unable to procure such

insurance in the open or excess insurance market.