Whenever real property has been operated by a county as an art institute, the county board of supervisors, in addition to its other powers, may, without complying with the other provisions of this article, enter into an operating lease or management contract with a nonprofit corporation or association or with the governing board of a public or private school, college or university, or school or college district, for the management, operation, or maintenance of such property as a post secondary school of the arts. Any such lease or contract shall not exceed a term of 99 years and may contain such other terms and conditions as may be agreed upon, including the right of the lessee or contractor to use fixtures and personal property situated on the realty at the date of execution of such lease or contract and necessary for the operation of the realty.