Under implied consent, an officer can’t do any sort of testing without having read you the implied consent and gotten some sort of a reply from you. That can be either a verbal reply or a non-verbal nod. You have to indicate to them whether or not you are going to take the test. If somebody is unconscious, then they cannot consent or refuse to test. Unless we’re in the situation because there’s been an accident with serious bodily injury or death where an automatic blood draw occurs by law, then law enforcement needs to get some reply from you before ant test can be performed.