Maryland Courts and Judicial Proceedings Section 10-305

      (a)      The type of test administered to the defendant to determine alcohol concentration shall be the test of breath except that the type of test administered shall be:

            (1)      A test of blood if:

                  (i)      The defendant is unconscious or otherwise incapable of refusing to take a test to determine alcohol concentration;

                  (ii)      Injuries to the defendant require removal of the defendant to a medical facility;

                  (iii)      The equipment for administering the test of breath is not available; or

                  (iv)      The defendant is required to submit to a test of one specimen of blood under § 16-205.1(c)(1)(ii) of the Transportation Article; or

            (2)      Both a test of the person's breath and a test of one specimen of the person's blood if the defendant is required to submit to both a test of the person's breath and a test of one specimen of the person's blood under § 16-205.1(c)(1)(iii) of the Transportation Article.

      (b)      The type of specimen obtained from the defendant for the purpose of a test or tests to determine drug or controlled dangerous substance content shall be a blood specimen.

      (c)      Any person who is dead, unconscious, or otherwise in a condition rendering him incapable of test refusal shall be deemed not to have withdrawn consent.