(a) “Under the influence of alcohol per se” means having an alcohol concentration at the time of testing of 0.08 or more as measured by grams of alcohol per 100 milliliters of blood or grams of alcohol per 210 liters of breath.

(b) If the alcohol concentration is measured by milligrams of alcohol per deciliter of blood or milligrams of alcohol per 100 milliliters of blood, a court or an administrative law judge, as the case may be, shall convert the measurement into grams of alcohol per 100 milliliters of blood by dividing the measurement by 1000.