Yes, they are still in effect until you apply to have them removed.
If you have "not been documented" has having alcohol or drugs in the last ten years, the department of public safety will remove the restriction. But only if you make "proper application".
If you believe you qualify to have your restriction removed, you can contact the Minnesota Department of Public Safety to get an application.
Unfortunately, yes, you must take affirmative steps to get the B-card restriction off your license. Time alone does not heal all wounds.
Nothing herein shall constitute legal advice, nor has an attorney-client relationship been formed. www.KellerLawOffices.com
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