A number of the elements that work out how will treat a conviction for a drunken driving Colorado DUI Laws offense are: the actual fact pattern in your case whether there are previous DUI arrests, your alcohol level, the county in which the offense happened and how you protect or don’t protect yourself against the charges. Jail is compulsory for DUI in Colorado if you have previous alcohol related offenses. Jail is also imperative above a certain BAC level and as of August 2013, the NTSB is pushing to lower the DUI limit from a BAC of .08 to .05.