The Boundary and Annexation Survey (BAS)

BAS-11(L)
(9-2012)

DC

UNITED STATES DEPARTMENT OF COMMERCE
Economics and Statistics Administration

U.S. Census Bureau
Washington, DC 20233-0001
OFFICE OF THE DIRECTOR

FROM THE DIRECTOR
U.S. CENSUS BUREAU
The U.S. Census Bureau conducts the Boundary and Annexation Survey (BAS) to update our
records regarding changes to legal boundaries, names, and governmental status for federally
recognized American Indian reservations, off-reservation trust land, and tribal subdivisions
within the United States effective on or before January 1 of the survey year. This voluntary
survey is an important opportunity for you to ensure that we have your correct boundary and
legal name. The Census Bureau will use the boundary information you provide to report data
from the American Community Survey (ACS) and other Census programs and surveys.
The enclosed checklist contains information about the materials in your BAS package, as well
as how to change your response method. Information describing how to update the enclosed
materials is available in the BAS Tribal Respondent Guide. This information is also provided on
the BAS Web site at .
All legal boundary changes received by March 1 will be included in this year’s boundary
delivery for the ACS. All legal boundary changes and boundary corrections received by
May 31 will be included in your BAS materials for next year. If you need any assistance with
this request, please e-mail , telephone 1–800–972–5651, or visit our
Web site at .
The Census Bureau appreciates your response to this important voluntary survey.
Sincerely,

Thomas L Mesenbourg, Jr.
Acting Director
Enclosures

census.gov