Some states allow a person to drive whose license has been suspended or revoked for driving under the influence (DUI) if the driver uses a vehicle equipped with an ignition interlock device. The ignition interlock device wont allow the vehicle to be started if it detects alcohol on your breath. The device may also require additional "rolling retests" while the vehicle is being driven.
If you drive employer-owned vehicles during work hours, the vehicles must be equipped with an interlock device. However, this requirement may usually be waived if your employer signs an Employer Declaration for Ignition Interlock License.
This form is a generic example that may be referred to when preparing such a form for your particular state. It is for illustrative purposes only. Local laws should be consulted to determine any specific requirements for such a form in a particular jurisdiction.