Service of statutory notice under section 269D(2) is essential; failure to serve all affected persons voids acquisition proceedings. Failure to serve the notice required by section 269D(2) vitiates acquisition proceedings because it denies transferors and transferees a statutory safeguard. The Board directs Commissioners to ensure Inspecting Assistant Commissioners (Acquisition) strictly serve the notice on the transferor, the transferee, the occupier if the transferee is not in occupation, and every person known to be interested in the property.