What is the test for good faith or blameless intent in a criminal case?

often recognizes "good faith or blameless intent as a defense, partial defense, or as an element to be considered in mitigation of punishment." Id. at 265, 72 S.Ct. 240. Second, a person should have fair notice as to the likely consequences of voluntary acts. The terms in a penal statute defining an offense "must be sufficiently explicit to inform those who are subject to it what conduct on their part will render them liable to its penalties." Connally v. Gen. Const. Co. , 269 U.S. 385, 391, 46 S.Ct. 126, 70 L.Ed. 322 (1926).