If a person refuses to give a sample, then the police will not take a sample. If the person agrees to give a sample, then the police will decide whether that sample is going to be a breath test, a urine test, or a blood test. In most situations, chemical testing is done through a breath test at the police station. In some situations, the police could choose to do a urine sample and, in other situations, the police could ask for one breath sample and then also a urine sample, but the implied consent laws apply to any of the three with the final decision as to which tests to administer being decided by the police.