(a) The Secretary of the Army may set aside, when available, a suitable area or areas in Arlington National Cemetery, Virginia, to honor the memory of members of the Armed Forces and veterans
(1) who are missing in action;
(2) whose remains have not been recovered or identified;
(3) whose remains were buried at sea, whether by the members or veterans own choice or otherwise;
(4) whose remains were donated to science; or
(5) whose remains were cremated and whose ashes were scattered without interment of any portion of the ashes.
