In a letter dated August 28, 2012, U.S. Transportation Secretary Ray LaHood called on the governors of 26 states, Puerto Rico and the mayor of the District of Columbia, to prepare to meet new federal regulations that the U.S. Department of Transportation plans on proposing in the near future. The proposed federal regulations would require them to strengthen and increase their oversight of public transit safety and are part of Moving Ahead for Progress in the 21st Century (MAP-21), a new two-year transportation authorization bill signed by President Obama in July, 2012.