California (where I live) has every-other-year emissions tests, and that's it.
EDIT: There's a pretty comprehensive list on Wikipedia: https://en.wikipedia.org/wiki/Vehicle_inspection_in_the_Unit...
EDIT 2: A summary:
Passenger vehicle inspection timeframe:
Annually: Delaware, Hawaii, Louisiana, Maine, Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, Texas, Vermont, Virginia
Biennially: Missouri, Rhode Island, West Virginia
On transfer (sale or import from other jurisdiction): Kentucky, Maryland, Nebraska
California (where I live) has every-other-year emissions tests, and that's it.
EDIT: There's a pretty comprehensive list on Wikipedia: https://en.wikipedia.org/wiki/Vehicle_inspection_in_the_Unit...
EDIT 2: A summary:
Passenger vehicle inspection timeframe:
Annually: Delaware, Hawaii, Louisiana, Maine, Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, Texas, Vermont, Virginia
Biennially: Missouri, Rhode Island, West Virginia
On transfer (sale or import from other jurisdiction): Kentucky, Maryland, Nebraska