In Montana, the only chemical tests for purposes of the Implied Consent Advisory are blood and breath tests.  Blood analysis is potentially more accurate as breath machines are susceptible to a number of problems rendering them often unreliable.  However, you are not offered a choice in these tests, it is the officer’s discretion.  You are given the opportunity to pay for your own private blood test.   If you provide a breath test you should always request an independent test.  Make this request once, unequivocally, while you are in the jail immediately after you provide your breath sample.  If the officer fails to immediately make the independent test available it can be the basis for a motion to suppress your breath test results.