All states, A–Z
- AlabamaRequired in some counties
- AlaskaRequired statewide
- ArizonaRequired in some counties
- ArkansasNot required by law
- CaliforniaRequired statewide
- ColoradoNot required by law
- ConnecticutNot required by law
- DelawareNot required by law
- District of ColumbiaNot required by law
- FloridaRequired statewide
- GeorgiaNot required by law
- HawaiiNot required by law
- IdahoNot required by law
- IllinoisRequired statewide
- IndianaNot required by law
- IowaNot required by law
- KansasNot required by law
- KentuckyRequired in some counties
- LouisianaNot required by law
- MaineNot required by law
- MarylandNot required by law
- MassachusettsNot required by law
- MichiganNot required by law
- MinnesotaNot required by law
- MississippiNot required by law
- MissouriRequired in some counties
- MontanaNot required by law
- NebraskaRequired in some counties
- NevadaRequired in some counties
- New HampshireNot required by law
- New JerseyRequired in some counties
- New MexicoRequired statewide
- New YorkNot required by law
- North CarolinaNot required by law
- North DakotaNot required by law
- OhioNot required by law
- OklahomaRequired in some counties
- OregonRequired statewide
- PennsylvaniaNot required by law
- Rhode IslandNot required by law
- South CarolinaNot required by law
- South DakotaNot required by law
- TennesseeNot required by law
- TexasRequired statewide
- UtahRequired statewide
- VermontNot required by law
- VirginiaNot required by law
- WashingtonRequired statewide
- West VirginiaRequired in some counties
- WisconsinNot required by law
- WyomingNot required by law