Table A3.

Selected laws in the domain of impaired driving regulations used in analysis. The number of states enacting related laws in 1980–2010 is given in parentheses.

Domain	Policy	Law	Source
Impaired Driving Regulation	Open container	Whether open containers of alcohol are banned in MV passenger compartments (34)	[89]
	Zero tolerance	Whether a zero tolerance law applies (50)	[90]
		The age below which zero tolerance law applies (50)	[90]
		The BAC level for charging offender under zero tolerance law (50)	[90]
	DUI penalties	Blood alcohol concentration level above which a person is presumed to have been driving under the influence (49)	[90]
		Whether imprisonment is part of mandatory penalty for first-time DUI offenders (24)
		Minimum number of days the first-time DUI offender must serve in prison (27)
		Whether imprisonment is part of mandatory penalty for second-time DUI offenders (30)
		Minimum number of days the second-time DUI offender must server in prison (36)
		Whether penalty license suspension is mandatory for first-time DUI offenders (30)
		The minimum number of days the licenses of the first-time DUI offender must be suspended (38)
		Whether penalty license suspension is mandatory for second-time DUI offenders (32)
		The minimum number of days the licenses of the second-time DUI offender must be suspended (39)
		Whether a fine is mandatory for first-time DUI offenders (26)
		Minimum fine for first-time DUI offenders (45)
		Whether a fine is mandatory for second-time DUI offenders (28)
		Minimum fine for second-time DUI offenders (43)