42 U.S. Code § 10362 - Definitions
In this section: 
The term “Administrator” means the Administrator of the National Oceanic and Atmospheric Administration.
(2) Advisory Committee
The term “Advisory Committee” means the National Advisory Committee on Water Information established—
(3) Assessment program
(4) Climate division
The term “climate division” means 1 of the 359 divisions in the United States that represents 2 or more regions located within a State that are as climatically homogeneous as possible, as determined by the Administrator.
(7) Eligible applicant
The term “eligible applicant” means any State, Indian tribe, irrigation district, water district, or other organization with water or power delivery authority.
(8) Federal Power Marketing Administration
The term “Federal Power Marketing Administration” means—
(9) Hydrologic accounting unit
The term “hydrologic accounting unit” means 1 of the 352 river basin hydrologic accounting units used by the United States Geological Survey.
(10) Indian tribe
(11) Major aquifer system
The term “major aquifer system” means a groundwater system that is—
(12) Major reclamation river basin
(A) In general
The term “major reclamation river basin” means each major river system (including tributaries)—
(13) Non-Federal participant
The term “non-Federal participant” means—
The term “program” means the regional integrated sciences and assessments program—
(A) In general
Except as provided in subparagraph (B), the term “Secretary” means the Secretary of the Interior.
(17) Service area
 So in original. Probably should be a reference to this chapter.