24 CFR § 1000.206
How is a TDHE designated?
February 22, 2021
(a)
(1) By resolution of the Indian tribe or Indian tribes to be served; or
(2) When such authority has been delegated by an Indian tribe's governing body to a tribal committee(s), by resolution or other written form used by such committee(s) to memorialize the decisions of that body, if applicable.
(b) In the absence of a designation by the Indian tribe, the default designation as provided in section 4(21) of NAHASDA shall apply.