Notwithstanding § 7-404 of this subtitle on relocation program and payments, any highway, other public facility, or facility of a public utility company dislocated by action of the Administration shall be relocated if the facility is devoted to public use. If a substitute facility is necessary, the Administration shall pay the reasonable nonbetterment cost of relocation. This section may not be construed to affect any agreement relating to, or any interest in, real property owned or controlled by the Administration.