In the United States, vehicle safety inspection and emissions inspection are governed by each state individually. 17 states have a periodic (annual or biennial) safety inspection program, while Maryland and Alabama require a safety inspection on sale or transfer of vehicles which were previously registered in another state. New Jersey discontinued its passenger vehicle safety inspection program on August 1, 2010.
In 1977, the federal Clean Air Act was amended by Congress to require states to implement vehicle emissions inspection programs, known as I/M programs (for Inspection and Maintenance)...
In the United States, emissions standards are managed on a national level by the Environmental Protection Agency (EPA). State and local governments may apply for waivers to enact stricter regulations.
== Motor vehicles ==
Due to its preexisting standards and particularly severe motor vehicle air pollution problems in the Los Angeles metropolitan area, the U.S. state of California has special dispensation from the federal government to promulgate its own automobile emissions standards. Other states may choose to follow either the national standard or the stricter California standards. Stat...
Why is the output of following code -9 not 9 ?
The code is :
print ("%u" %-9)
According to my knowledge %u is format specifier for unsigned integers so why does -9 get printed instead of 9 ?
