There is hereby created the Oklahoma National Guard Museum, to be under the supervision of the Adjutant General. The Adjutant General may appoint an Executive Director to oversee the daily operations and maintenance of the museum and perform other duties as requested by the Adjutant General. Appropriate state agencies are directed to make available, for display of items of historical significance and necessary space for administration, the buildings presently occupied by the Oklahoma Military Department, located in the vicinity of 36th Street and North Eastern in Oklahoma City, Oklahoma. The building herein referred to shall be made available by the Adjutant General as soon as same is no longer needed by and is vacated by the Oklahoma Military Department. The Executive Director, subject to the approval of the Adjutant General, may lease to the 45th Infantry Division Association, for periods not exceeding one (1) year and with provisions for renewal from year to year, an area to be used as a gift shop, if the lease does not interfere with its use by the Oklahoma National Guard Museum. The proceeds of the sales from the gift shop shall remain with the 45th Infantry Division Association for operating purposes.