Okla. Stat. tit. 63, § 2166

Regional blood service systems operating within the state shall establish plans and procedures for the exchange of blood and blood products on a basis of regularly scheduled shipments based upon past use and anticipated needs. Prior to contracting with out-of-state blood suppliers for blood products, blood service systems operating within the state shall first seek to contract with other systems operating within the state and shall not enter into contracts for shipments of blood and blood products from service systems not operating within the state until after exhausting efforts to establish a contractual agreement for shipments from blood service systems operating within the state. Laws 1980, c. 281, § 6, eff. Oct. 1, 1980.