The Local Update of Census Addresses (LUCA) program provided an opportunity for designated representatives of local, state, and tribal governments to review addresses contained in the Census Bureau's MAF/TIGER database. It was made possible by the Census Address List Improvement Act of 1994 (Public Law 103-430) The program operated as follows:

• The invited governments designated a LUCA liaison to review the portion of the Census address list covering their area of jurisdiction. The LUCA liaison was subject to the same confidentiality requirements as census workers, prohibiting the disclosure of census information. The address list is confidential under Title 13 U.S.C. and participants had to review a set of security guidelines and sign a confidentiality agreement promising to protect the confidentiality of the addresses.
• The Census Bureau sent the LUCA liaison an address list from the MTDB, corresponding maps, and address tallies.
• In areas with city-style addresses (i.e. house number/street name), the LUCA liaison could comment on individual addresses on the list, as well as addresses missing from the list. The Census Bureau verified this input during the Address Canvassing Operation and provided feedback to the participants about the results.
• In areas with noncity-style addresses (e.g., rural route and box number or post office box numbers), the LUCA liaisons could challenge the count of housing unit and group quarters addresses. The Census Bureau visited each census block during the 2010 Census Address Canvassing Operation and updated the Census address list. The Census Bureau provided the LUCA participants with an updated address list and maps during the feedback phase.
• Public Law 103-430 allowed the LUCA participants to appeal the Census Bureau address determinations provided during the feedback phase. All appeals had to be adjudicated prior to Census Day to ensure that the housing unit was visited during the enumeration phase. An agency independent of the Census Bureau reviewed and decided on all appeals prior to Census Day, April 1, 2010.

LUCA liaisons from participating governments reviewed the Census Bureau's address lists from November 2007 through May 2008. After the Census Bureau processed their updates and performed the Address Canvassing operation, the participants were able to review the feedback and have appeals adjudicated from October 2009 through March 2010. For more information about the 2010 Census Program, please see:

Title 13 is the law under which the Census Bureau operates. The law guarantees the confidentiality of census information, and establishes penalties for disclosing this information.

You can learn more about Title 13, and data protection and privacy via the Internet at the following websites:

The Census Address List Improvement Act of 1994 (Public Law 103-430), approved on October 31, 1994, changed the Census Bureau's decennial census address list development procedures. The Act expanded the methods the Census Bureau could use to exchange information with tribal, state, and local governments in order to support its overall residential address list development and improvement efforts. The Act was primarily designed to improve the accuracy of address lists for the censuses conducted by the Census Bureau and household surveys through this partnership, and as such, the Act's provisions are directed to several areas:

1. The publication by the Secretary of Commerce regarding standards for content and structure of address information by which tribal, state, and local governments might submit for developing a national address list;
2. Rules governing tribal, state, and local governments access to census address information for the purpose of verifying accuracy of the information for census purposes;
3. Development of an appeals process, and;
4. An amendment to existing law that specifies that the Postal Service shall provide to the Secretary of Commerce for use by the Census Bureau such address information, as may be determined by the Secretary to be appropriate for any census or survey.

The Act authorized the Census Bureau to share residential individual addresses with officials of tribal, state, and local governments who agreed to pledges and conditions of confidentiality. Prior to the Census 2000, the Census Bureau was limited to providing block summary totals of addresses to tribal and local governments. The Census 2000 marked the first decennial where residential address lists could be shared with tribal and local governments, provided they signed the required confidentiality agreement.

You can find more information about P.L. 103-430 via the Internet at the following websites:

Library of Congress detailed information on H.R. 5084, which later became P.L. 103-430 (under "Find more legislation" select "Public Laws," select "103" for the Congress, select the range "103-401 - 103-450", scroll down to "430".)