# 90.3 § 90.3 Definitions.
As used in this part (except where the context clearly indicates otherwise) the following definitions shall apply:
(a) *Census Bureau* means the U.S. Census Bureau, Department of Commerce.
(b) *Population Estimates Challenge* means, in accordance with this part, the process a governmental unit may use to provide additional input data for the Census Bureau's population estimate and the submission of substantive documentation in support thereof.
(c) *Director* means Director of the Census Bureau, or an individual designated by the Director to perform under this part.
(d) *Population estimate* means a statistically developed calculation of the number of people living in a governmental unit to update the preceding census or earlier estimate.
(e) A *governmental unit* means the government of a county, municipality, township, incorporated place, or other minor civil division, which is a unit of general-purpose government below the State.
(f) A *non-functioning county or statistical equivalent* means a sub-State entity that does not function as an active general-purpose governmental unit. This situation exists in Connecticut, Rhode Island, for selected counties in Massachusetts, and for the Census Areas in Alaska.
[88 FR 17705, Mar. 24, 2023, as amended at 91 FR 2855, Jan. 23, 2026]