The police cannot ask for a drug test without the consent of the person being tested. In order to do so, they must obtain an informed consent form from the individual before administering any tests. Furthermore, even if a drug test is requested without consent, it may still be considered invalid and not admissible in court. Therefore, it is essential for police officers to understand their legal obligations when requesting a drug test and ensure that they have obtained informed consent from the individual prior to conducting any tests.