Implied consent has the meaning that when you operate a CMV on public roads, you ____________.

Any person who drives or attempts to drive a motor vehicle on a highway or on any private property used by the public in general, consents to take a test to determine alcohol concentration or a test to determine the concentration of a drug or a controlled dangerous substance. Testing is free of charge to the driver and shall be given a breath test to determine alcohol concentration, unless the driver or other persons require medical treatment for serious or life threatening injury or the test equipment is unavailable. In that event, the test shall be a blood test. A test to determine drug or controlled dangerous substance content shall also be a blood test. [Commercial Driver License Manual]