Blood Alcohol Concentration (BAC) Limits

Youth (Underage Operators of Noncommercial Motor Vehicles)

Laws addressing blood alcohol concentration limits applicable to drivers of noncommercial automobiles, trucks, and motorcycles who have not reached the legal drinking age of 21 years.

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Changes Over Time for Youth (Underage Operators of Noncommercial Motor Vehicles)
Jurisdiction Date Range BAC Limit Lower Age Limit Upper Age Limit Per Se Citations
DE (Delaware)
1/1/1998 - 7/13/19980.02021 1 Citations
DE (Delaware)
7/14/1998 - 1/1/20170.02021Yes2 Citations
MD (Maryland)
1/1/1998 - 9/30/20010.02021Yes1 Citations
MD (Maryland)
10/1/2001 - 1/1/20170.00021Yes2 Citations
MS (Mississippi)
1/1/1998 - 6/30/19980.08021Yes2 Citations
MS (Mississippi)
7/1/1998 - 1/1/20170.02021Yes3 Citations
SC (South Carolina)
1/1/1998 - 6/28/19980.0000 
SC (South Carolina)
6/29/1998 - 1/1/20170.02021Yes2 Citations
SD (South Dakota)
1/1/1998 - 6/30/19980.0000 
SD (South Dakota)
7/1/1998 - 1/1/20170.02021Yes2 Citations
TN (Tennessee)
1/1/1998 - 6/30/20160.021621Yes1 Citations
TN (Tennessee)

A BAC limit of 0.08 applies to drivers who are at least 18 years of age.

7/1/2016 - 9/18/20160.021618Yes3 Citations
TN (Tennessee)
9/19/2016 - 1/1/20170.021621Yes2 Citations
WY (Wyoming)
1/1/1998 - 6/30/19980.0000 
WY (Wyoming)
7/1/1998 - 1/1/20170.02021Yes2 Citations