Amends the Department of Transportation and Related Agencies Appropriations Act, 2003 to authorize the Under Secretary of Transportation for Security of the Transportation Security Administration to issue a letter of intent for specified amounts of airport security improvement project funds to East Kern Airport District in Mojave, California: (1) to reimburse the airport for airport security costs incurred since September 11, 2001; and (2) for airport security costs for each fiscal year, including the cost of employing airport security personnel.