new-rule principle. Criminal procedure. A doctrine barring federal courts from granting habeas corpus relief to a state prisoner because of a rule, not dictated by existing precedent, announced after the prisoner’s conviction and sentence became final. — Also termed nonretroactivity principle. See HABEAS CORPUS . [Cases: Courts 100(1). C.J.S. Courts §§ 147–148.]

[Blacks Law 8th]