If you are stopped by a police officer in Maryland and are suspected to be under the influence, the law enforcement officer may request that you to submit to a field sobriety test or portable breath test. If you are arrested for impaired driving, the officer must advise you of your rights and provide you with an Advice of Rights form (DR-15) before requesting that you submit to a chemical blood alcohol concentration (BAC) test.
Blood alcohol concentration (BAC) is the amount of alcohol present in a 100 milliliter (mL) volume of blood. For example 80 mg is 0.08 grams, 0.08 grams of alcohol in 100 mLs is written as 0.08%. In other words, 80 mg% is equal to 0.08% which is equal to 80 mg/dL (deciliter; 100 mLs). This value can also be described as 0.08 BAC.
If you test above the legal limit for alcohol (0.08 BAC), or refuse an officer’s request to submit to a chemical test for alcohol or drug use, you will be issued an Order of Suspension (form #DR-015A) along with your traffic citation(s).
The police officer will confiscate your Maryland driver’s license and may issue you a 45-day temporary paper license.
If you were operating a commercial vehicle or are a commercial driver license holder at the time of your stop, you are also subject to the disqualification of your commercial driving status.
Source: Maryland Department Of Transportation Motor Vehicle Administration