---
kind: "section"
citation: "33 U.S.C. § 2310"
title: "33"
title_heading: "Navigation and Navigable Waters"
number: "2310"
heading: "Cost sharing for Territories and Indian tribes"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/33/2310"
units:
  - "Chapter 36 — Water Resources Development"
  - "Subchapter V — General Provisions"
---

# §2310. Cost sharing for Territories and Indian tribes

- (a) **In general—** The [Secretary](/usc/33/426h–1.md?p=2) shall 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](/usc/25/5304.md)); 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](/usc/33/426h–1.md?p=2) shall adjust the dollar amount specified in [subsection (a)](#a) on an annual basis for inflation.
- (c) **Inclusion—** For purposes of this section, the term “study” includes a watershed assessment.
- (d) **Application—** The [Secretary](/usc/33/426h–1.md?p=2) shall apply the waiver amount described in [subsection (a)](#a) to reduce only the non-Federal share of study and project costs.

## Source credit

(Pub. L. 99–662, title XI, § 1156, Nov. 17, 1986, 100 Stat. 4256; Pub. L. 113–121, title I, § 1032, June 10, 2014, 128 Stat. 1233; Pub. L. 114–322, title I, § 1119, Dec. 16, 2016, 130 Stat. 1643; Pub. L. 115–270, title I, §§ 1155(a), 1156, Oct. 23, 2018, 132 Stat. 3793; Pub. L. 116–260, div. AA, title I, § 135, Dec. 27, 2020, 134 Stat. 2649; Pub. L. 117–263, div. H, title LXXXI, § 8114, Dec. 23, 2022, 136 Stat. 3707.)

## Notes

### Editorial Notes

### Amendments

2022—Subsec. (a)(3). Pub. L. 117–263, § 8114(1), added par. (3).

Subsecs. (c), (d). Pub. L. 117–263, § 8114(2), added subsecs. (c) and (d).

2020—Subsec. (b). Pub. L. 116–260 substituted “on an annual basis for inflation.” for “for inflation for the period beginning on November 17, 1986, and ending on October 23, 2018.”

2018—Subsec. (a)(2). Pub. L. 115–270, § 1155(a), substituted “or tribal organization (as those terms are defined in section 5304 of title 25).” for “(as defined in section 5130 of title 25).”

Subsec. (b). Pub. L. 115–270, § 1156, substituted “October 23, 2018” for “June 10, 2014”.

2016—Pub. L. 114–322, § 1119(1), inserted “and Indian tribes” after “Territories” in section catchline.

Subsec. (a). Pub. L. 114–322, § 1119(2), inserted dash after “projects” and par. (1) designation before “in American” and added par. (2).

2014—Pub. L. 113–121 designated existing provisions as subsec. (a) and inserted heading, inserted “Puerto Rico,” before “and the Trust Territory of the Pacific Islands”, and added subsec. (b).

### Executive Documents

### Termination of Trust Territory of the Pacific Islands

For termination of Trust Territory of the Pacific Islands, see note set out preceding section 1681 of Title 48, Territories and Insular Possessions.