In a Pennsylvania DUI prosecution, urine is not used to detect the amount of alcohol in one's system. Currently, there are no laboratories approved by the Pennsylvania Department of Health to test urine for the presence of alcohol in a Pennsylvania DUI prosecution. Urine testing is used only to determine whether there is the presence of controlled substances in one's system. Pennsylvania is essentially a zero tolerance state when it comes to controlled substances. Section 3802(d) of the Motor Vehicle Code prohibits a motorist to drive with any amount of a Schedule I, or non-prescribed Schedule II or Schedule III, controlled substances, or their metabolite. Therefore, urine tests can be used to detect these substances in a DUI prosecution. Urine is infrequently used by police in a Pennsylvania DUI prosecution because of this limitation. In the event urine is used as the chemical test in your DUI prosecution, the police must comport with all procedures promulgated by the Pennsylvania Department of Health such as submitted the urine sample to a laboratory approved and published in The Pennsylvania Bulletin for testing controlled substances via a urine sample.