Naturalization and District numbers changed between 1933 and 1943. As of the date of the study group there hasn't been a concrete list found which actually describes the changes that were made. Some district headquarters moved from one city to another. There may also have been boundary changes. These boundary changes may have had an impact on the "boundaries and jurisdiction" descriptions. The amount of districts grew during these years also. Not available are the descriptions of the new districts and there boundaries regarding districts 24 through 29, although some may seem evident.
At jewishgen.org there is a list of the district numbers during these years. It lists the district number, INS Naturalization Offices and the District Boundaries and Jurisdictions. The list should be used to take the district number on a manifest to find the general geographic area in the United States. The link to this page is here.
(This study group followed "A Guide to Interpreting Passenger List Annotations" by Marion Smith, Historian, U.S. Immigration and Naturalization Service. With the assistance of Elise Friedman, Flora Gursky, and Eleanor Bien.)
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