The Coast Guard is extending the expiration dates of licenses, merchant mariners' documents and certificates of registry held by merchant mariners impacted by the effects of Hurricane Katrina. The authority for this temporary relief measure was included in the Coast Guard Maritime and Transportation Act of 2006. Details are contained in the notice published Aug. 16, 2006 in the Federal Register. This measure applies to certain mariners holding any of the above credentials that have expired on or after Aug. 29, 2005, or will expire before April 1, 2007. -- Credentials are automatically extended for one year from the expiration date for mariners whose home of record is listed as Alabama, Mississippi, or Louisiana on their merchant mariner credentials.