Your fiance's home state of New York and North Carolina, the state in which he was issued the DUI citation, are both members of the Driver's License Compact (DLC). As member states of the DLC it means the NC courts will inform the New York Department of Motor Vehicles about his DUI violation and conviction.

While NYS does not normally place out of state violations committed by NYS drivers on their New York driving record there are exceptions. The exceptions include alcohol related violations and drug related violations. The NYS DMV states that if you receive a conviction for an alcohol-related or drug-related driving violation in any state, your NYS driver license will be revoked for at least six months.

Your fiance may have been cited for the DUI while riding a bicycle instead of a car however many states will still place this offense on a person's driving record. To find out for certain if the NYS will revoke his license for this DUI on a bike in NC your fiance should contact the NYS DMV and get answers regarding his specific situation.