You need to have a hearing with the Secretary of State. You will have to show that you have completed the treaty recommended by your evaluation and have made changes so that you are not a risk to repeat the offense. It is highly advisable to have an attorney to assist you in this process.
Really depends on how many DUI he has had. If he has three previous convictions for DUI he will not be able to get his license back at all. No prior convictions one year, one prior conviction 5 years, two prior convictions (within 20 years) ten years.
That will all depend of a personal prior driving record and other significantly relevant factors of compliance and rehabilitation as evidenced by a well-prepared evidentiary submission. Have your friend retain a counsel.
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