IID required for restricted licenses for most convictions (state pays via IID fund for indigent); 6-month post-revocation IID standard, longer with enhancements; 'restricted geographic license' era largely replaced by IID-anywhere licenses.
By offense
First offense: IID required — IID required for restricted license if BAC 0.08+ (effectively most convictions); 6 months post-revocation IID standard; 0.15+ makes IID mandatory conditions stricter.
Second offense: IID required
Third offense: IID required
Fourth+ offense: IID required
Statute: T.C.A. §§ 55-10-409, 55-10-417
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