IID mandatory on High BAC restricted licenses and on any restricted license issued after revocation via Secretary of State hearing; sobriety courts use interlock for early restricted driving on repeat offenses.
By offense
First offense: IID not required at this level — Mandatory during the restricted period for High BAC (0.17+) convictions.
Second offense: IID required
Third offense: IID required
Statute: MCL 257.625k–625l; 257.304
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