(G)
the mother of a service-connected permanently and totally disabled veteran, if—
(i)
her husband is totally and permanently disabled;
(ii)
she is widowed, divorced, or separated from the father and has not remarried; or
(iii)
she has remarried but is widowed, divorced, or legally separated from her husband when preference is claimed;
but does not include applicants for, or members of, the Senior Executive Service, the Defense Intelligence Senior Executive Service, the Senior Cryptologic Executive Service, or the Federal Bureau of Investigation and Drug Enforcement Administration Senior Executive Service;