The Commission, upon the filing of a claim as hereinafter provided, may pay and discharge out of funds accruing in the State Highway Construction and Maintenance Fund any and all matured or delinquent installments of special assessments for street improvements which were levied against and constituted a lien upon any real property acquired by the Commission for any purpose at the time of the acquisition thereof, provided such assessments constitute a valid lien upon the property at the time of the payment thereof which, except for the immunity of the state from suit, could be enforced in the manner provided for the enforcement of such liens.
Okla. Stat. tit. 69, § 1504