Effective June 1, 2009, the Postal Service™ is revised the Mailing Standards of the United States Postal Service,Domestic Mail Manual (DMM®) 601.10.13.4 to comply with updated Department of Transportation (DOT) regulations. The changes require the following before shipping a lighter:
n A test report identifier code followed by an alpha/numeric identifier (LAA****) must be on the address side of the outer shipping container. The codes for specific lighters are issued by a lighter certification agency. This code replaces the previously used T–Number.