Effective with the partition of the joint reservation as provided in subsection (a) of this section, the area of land known as the “square” (defined as the Hoopa Valley Reservation established under section 2 of the Act of April 8, 1864 (
13 Stat. 40), the Executive Order of June 23, 1876, and Executive Order 1480 of February 17, 1912) shall thereafter be recognized and established as the Hoopa Valley Reservation. The unallotted trust land and assets of the Hoopa Valley Reservation shall thereafter be held in trust by the United States for the benefit of the Hoopa Valley Tribe.