Landholding agencies' responsibilities concerning the utilization of excess property are to—

(a) Achieve maximum use of their real property, in terms of economy and efficiency, to minimize expenditures for the purchase of real property;

(b) Increase the identification and reporting of their excess real property; and

(c) Fulfill its needs for real property, so far as practicable, by utilization of real property determined excess by other agencies, pursuant to the provision of this part, before it purchases non-Federal real property.