Clarifying the definitions of aggravating factor and prior impaired driving related loss of license and the crime of refusal to submit to chemical testing for driving while impaired purposes; providing for staggered sentencing of certain nonfelony DWI offenders, defining staggered sentencing; expanding the custodial arrest authority of peace officers; modifying the circumstances for conditional release and certain exceptions from implied consent drivers license revocation; excepting violations by persons with no qualified prior impaired driving incident from the definition of designated offense for vehicle forfeiture purposes; creating the offense of aiding and abetting an impaired driving offense; modifying the maximum sentencing stay period for certain criminal vehicular homicide and injury offenses (mk)