The legislature always changed the dui laws.  There are a vast array of changes to the law.  On Second or subsequent offenses you may no longer receive a probationary license.  On any offense if there is someone under age 16 in the vehicle with the driver, the penalties are increased.   The fines have increased as has some areas of jail time sentences.

  In other areas, the Montana Supreme Court has issued another ruling on the admissibility of the preliminary breath test used out at the scene of the stop.  This is the small portable machine.  These are not allowed in evidence in any trial unless the prosecution has first requested a hearing and shown that machine is reliability.