ANSI INCITS 455-2009 pdf download Codes for the Identification of Congressional Districts and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas
1. Scope and purpose
This standard establishes a structure for the assignment of identifying data codes to congressional districts of the United States and its insular and associated areas, for the purpose of information interchange among data processing systems.
2. Definitions and coverage Congressional districts are legislatively defined subdivisions of a State for the purpose of electing representatives or delegates to the House of Representatives of the United States Congress. A State or equivalent entity may comprise a single congressional district or similar representational area.
3. Assignment of identifying data codes
3.1. Assignment of congressional district codes Each congressional district to be identified under this standard shall be assigned a single congressional district code consisting of two digits. Each assigned congressional district code shall be unique within a state. The First Congressional District is identified as “01 ”, the Second Congressional District as “02”, etc. For a State whose representative is designated “at large” the Congressional District is designated as “00”. For an entity with a non-voting delegate – the District of Columbia, American Samoa, Guam, Puerto Rico (whose delegate is referred to as a “resident commissioner”), and the U. S.
Virgin Islands – the representational area is designated as “98”. For those entities with no representation in the Congress – the Northern Mariana Islands, Palau, and the several U.S. minor outlying islands – the area is designated as “99”.
4. Duties of the maintenance agency
4.1 Data accuracy and currency
The maintenance agency shall assure the accuracy and currency of names and codes of the congressional districts.
4.2 Documentation and dissemination of data files
The maintenance agency shall produce a complete file of the identified congressional districts and their assigned codes. This file is publicly available at:
http://www.census.gov/geo/www/ansi/ansi.html. Changes shall be reported by the reissuance of the updated complete file.