In this subchapter:

1. (1) BIA The term “BIA” means the Bureau of Indian Affairs.
2. (2) Department The term “Department” means the Department of the Interior.
3. (3) Secretary The term “Secretary” means the Secretary of the Interior.
4. (4) Under Secretary The term “Under Secretary” means the Under Secretary for Indian Affairs established under section 5633(a) of this title.

(Pub. L. 114–178, title III, § 302, June 22, 2016, 130 Stat. 439.)