38 U.S.C. § 3741

(1)

The term “disabled veteran” means (A) a veteran who is entitled to compensation under laws administered by the Secretary for a disability rated at 30 percent or more, or (B) a veteran whose discharge or release from active duty was for a disability incurred or aggravated in line of duty.

(2)

The term “veteran of the Vietnam era” means a person (A) who served on active duty for a period of more than 180 days, any part of which occurred during the Vietnam era, and who was discharged or released therefrom with other than a dishonorable discharge, or (B) who was discharged or released from active duty for a service-connected disability if any part of such active duty was performed during the Vietnam era.