33 U.S.C. § 2310 — Cost sharing for Territories and Indian tribes

(a) In general The Secretary must waive local cost-sharing requirements up to $200,000 for all studies and projects
(1) in American Samoa, Guam, the Northern Mariana Islands, the Virgin Islands, Puerto Rico, and the Trust Territory of the Pacific Islands;
(2) for any Indian tribe or tribal organization (as those terms are defined in section 5304 of title 25); and
(3) for any organization that
(A) is composed primarily of people who are
(i) recognized and defined under Federal law as indigenous people of the United States; and
(ii) from a specific community; and
(B) assists in the social, cultural, and educational development of such people in that community.
(b) Inflation adjustment The Secretary must adjust the dollar amount specified in subsection
(a) on an annual basis for inflation.
(c) Inclusion for this section, the term “study” includes a watershed assessment.
(d) Application The Secretary must apply the waiver amount described in subsection
(a) to reduce only the non-Federal share of study and project costs.