OK SB529

Creates the "Erin Elizabeth Swezey Act" relating to driving under the influence, amending multiple sections of Oklahoma statutes governing driver licenses and DUI penalties.

Requires driver licenses for persons subject to ignition interlock device orders to display "Interlock Required" designation, with the license remaining marked for the duration of the court order.

Mandates installation of ignition interlock devices during mandatory revocation periods for first, second, and third-or-subsequent DUI convictions, with installation periods ranging from 1.5 to 5 years depending on offense severity and prior convictions.

Modifies DUI penalties to require ignition interlock devices for drivers under 21 convicted of zero-tolerance alcohol violations, with specific requirements for second and subsequent convictions.

Applies modifications to Class D motor vehicles only and clarifies hearing procedures in district court appeals of license revocations, effective November 1, 2011.