25 CFR 39.1001: Definitions.

(a) Agency Education Office means a field office of the Office of Indian Education Programs providing administrative direction and supervision to one or more Bureau-operated schools as well as being responsible for all other education functions serving tribes within that agency's jurisdiction.

(b) Area Education Office means a field office of the Office of Indian Education Programs responsible for all education functions serving tribes not serviced by an agency education office an in some cases providing administrative direction to one or more off-reservation boarding schools not under an agency education office.