(a) Acquisition of improvements. When acquiring any interest in real property, the Agency shall offer to acquire at least an equal interest in all buildings, structures, or other improvements located upon the real property to be acquired, which it requires to be removed or which it determines will be adversely affected by the use to which such real property will be put. This shall include any improvement of a tenant-owner who has the right or obligation to remove the improvement at the expiration of the lease term.