If you receive too many tickets or accidents (incidents) within a specific period, such as one year, the DMV may require you to have SR22 for a month. If you accumulate more incidents within a one- or two-year period, they might bump that up to a year of SR22 and suspension. You need to check with the DMV at 503-299-9999 to find out how long (the PRU date) you must endure to meet the requirement.