Revise criminal laws related to DUI

This bill proposes to add a new type of driving under the influence offense in Montana for drivers who have certain prohibited substances other than alcohol or marijuana in their blood or body. It would amend existing criminal laws to allow prosecutors to charge drivers with DUI even when the substance detected is not alcohol or marijuana, provided it meets specific concentration thresholds. The legislation also updates related sections of the Montana Code Annotated to clarify how evidence of drug presence is used in DUI cases and defines what counts as being under the influence. Additionally, the bill modifies rules around driver rehabilitation programs, allowing some individuals with suspended or revoked licenses to participate in these programs and potentially receive restricted probationary licenses if they complete the required training.