As used in this part, unless the context otherwise requires:
(1) “Commissioner” means the commissioner of human services;
(2) “Department” means the department of human services;
(3) “Director” means the director of a division within the department;
(4) “Division” means one (1) of the divisions created within the department of human services for the purposes of administration;
(5) “Region” means one (1) or more counties grouped for the purpose of local administration; and
(6) “Regional director” means the director of a region.