A letter report issued by the Government Accountability Office with an abstract that begins "The United States enacted legislation in May 2008 applying federal immigration law to the Commonwealth of the Northern Mariana Islands (CNMI) subject to a transition period. The CNMI is subject to most U.S. laws but has administered its own immigration system, including admitting foreign workers, tourists, and foreign investors. The Secretary of Homeland Security, in consultation with the Secretaries of the Interior, Labor, and State, and the Attorney General, has the responsibility to establish a transition program. GAO was asked to review how the legislation's implementation may affect the CNMI economy, in particular the CNMI's (1) labor market, including foreign workers; (2) tourism sector; and (3) foreign investment. This report is based on GAO's March 2008 report (GAO-08-466) and analysis of data on the CNMI's labor market, tourism sector, and foreign investment."