Results from the chemical testing of breath, blood, or urine for alcohol can provide strong evidence in an OVI/DUI case. The results of chemical tests can be used not only as evidence that the person was impaired but can form the basis of a “per se” OVI charge when the test result is over the legal limit. However, chemical tests are subject to numerous laws, regulations, and protocols that determine whether the test results can even be used as evidence against you. First, there are statutory admissibility requirements. Second, there are detailed regulations promulgated by the Ohio Director of Health that must be followed. Finally, the person administering the test must follow the appropriate protocol and the manufacturer’s directions for the test and any equipment involved.