State | MLDA21 Law Effective Data | Zero Tolerance Law (<0.02 BAC, Age Under 21) |
---|---|---|
Alabama | 10/1/85 | 5/28/96 |
Alaska | 11/1/84 | 8/10/96 |
Arizona | 1/1/85 | 6/28/90 |
Arkansas | 1935 | 8/12/93 |
California | 1933 | 1/1/94 (Previously 0.05 Age < 18) |
Colorado | 7/1/87 | 7/1/97 |
Connecticut | Age 21 9/1/85 Age 19 to 20 10/1/83 Age 18 to 19 7/1/82 |
10/1/95 |
Delaware | 1/1/84 | 7/1/95 |
Florida | Age 21 7/1/85 Age 18 to 19 10/1/80 |
1/1/97 |
Georgia | Age 21 9/30/86 Age 19 to 20 9/30/85 Age 18 to 19 9/1/80 |
7/21/97 (Previously 0.06 Age < 18) |
Hawaii | 10/1/86 | 12/1/97 |
Idaho | 4/10/87 | 7/1/94 |
Illinois | 1/1/80 | 1/1/95 |
Indiana | 1934 | 1/1/97 |
Iowa | Age 21 9/1/86 Age 18 to 19 7/1/78 |
7/1/95 |
Kansas | 7/1/85 | 1/1/97 |
Kentucky | 1938 | 10/1/96 |
Louisiana | 3/15/87 | 7/15/97 |
Maine | Age 21 7/1/85 Age 18 to 20 10/24/77 | 9/29/95 |
Maryland | 7/1/82 | 5/29/90 |
Massachusetts | 6/1/85 | 6/27/94 |
Michigan | 12/21/78 | 11/1/94 |
Minnesota | Age 21 9/1/86 Age 18 to 19 9/1/76 |
6/1/93 |
Mississippi | 10/1/86 | 1998 |
Missouri | 1945 | 8/28/96 |
Montana | Age 21 4/1/87 Age 18 to 19 1/1/79 |
10/1/95 |
Nebraska | Age 21 1/1/85 Age 19 to 20 7/19/80 |
1/1/94 |
Nevada | 1935 | 7/16/97 |
New Hampshire | Age 21 6/1/85 Age 18 to 20 5/24/79 |
1/1/93 |
New Jersey | Age 21 1/1/83 Age 18 to 19 ½/80 |
12/17/92 (Previously 0.04 Age < 21) |
New Mexico | 1934 | 1/1/94 (Previously 0.05 Age < 18) |
New York | Age 21 12/1/85 Age 18 to 19 12/4/82 |
11/1/96 |
North Carolina | Age 21 9/1/86 Age 18 to 19 10/1/83 |
9/15/95 (Previously 0.00 Age < 18) |
North Dakota | 1936 | 7/1/97 |
Ohio | Age 21 7/31/87 Age 18 to 19 8/19/82 |
5/4/94 (Previously 0.02 Age < 18) |
Oklahoma | 11/1/85 | 11/1/96 |
Oregon | 1933 | 7/1/91 |
Pennsylvania | 1935 | 8/2/96 |
Rhode Island | Age 21 7/1/84 Age 19 to 20 7/1/81 Age 18 to 19 7/1/80 |
6/30/95 (Previously 0.04 Age < 18) |
South Carolina | Age 21 9/14/86 Age 19 to 20 1/1/85 Age 18 to 19 1/1/84 |
7/1/93 |
South Dakota | Age 21 4/1/88 Age 18 to 19 7/1/84 |
1998 |
Tennessee | Age 21 8/1/84 Age 18 to 19 6/1/79 |
7/1/93 |
Texas | Age 21 9/1/86 Age 18 to 19 9/1/81 | 9/1/97 |
Utah | 1935 | 7/1/92 |
Vermont | 7/1/86 | 9/1/97 (Previously 0.02 Age < 18) |
Virginia | Age 21 7/1/85 Age 18 to 19 7/1/81 |
7/1/94 |
Washington | 1934 | 7/1/94 |
West Virginia | Age 21 7/1/86 Age 18 to 19 7/1/83 |
6/12/94 |
Wisconsin | Age 21 9/1/86 Age 18 to 19 7/1/84 |
10/14/97 (Previously 0.00 Age < 19) |
Wyoming | 7/1/88 | 1998 |
Sources: NHTSA; Insurance Institute for Highway Safety; O'Malley and Wagenaar (1991).