Boundary and Annexation Survey

BAS-9L
OMB Control No.: 0671-0151
Expiration Date: 11-30-2023

A Message from the Director, U.S. Census Bureau:
Thank you for your response to the Boundary and Annexation Survey (BAS). Enclosed are materials you
requested to report boundary changes. Use the provided materials to create your BAS submission.
Participants that received the Geographic Update Partnership Software and BAS partnership shapefiles
on CD/DVD should refer to the ‘Read Me file’ on the data CD/DVD for more information on preparing
your BAS submission.
Participants that received paper maps should refer to the insert (BAS-5I) for next steps to begin
preparing your BAS submission.
KEY DATES
January 1

Boundary updates must be legally in effect on or before this date to be reported in the
current survey year.

March 1

First BAS deadline - Boundary updates returned by this date will be reflected in the
American Community Survey (ACS) and Population Estimates Program (PEP) data and in
next year’s BAS materials.

May 31

Final BAS deadline - Boundary updates returned by this date will be reflected in next
year’s BAS materials.
CONTACT INFORMATION

Email:
Phone: 1-800-972-5651
Website:
Thank you for your participation in the BAS.
Enclosures

census.gov