(1) Unless otherwise provided, ignorance or mistake of fact which disproves the culpable mental state is a defense to any prosecution for that crime.

(2) Ignorance or mistake concerning the existence or meaning of a penal law is no defense to a crime unless: (a) Due to his ignorance or mistake, the actor reasonably believed his conduct did not constitute an offense, and (b) His ignorance or mistake resulted from the actor's reasonable reliance upon: (i) An official statement of the law contained in a written order or grant of permission by an administrative agency charged by law with responsibility for interpreting the law in question; or (ii) A written interpretation of the law contained in an opinion of a court of record or made by a public servant charged by law with responsibility for interpreting the law in question.

(a) Due to his ignorance or mistake, the actor reasonably believed his conduct did not constitute an offense, and

(b) His ignorance or mistake resulted from the actor's reasonable reliance upon: (i) An official statement of the law contained in a written order or grant of permission by an administrative agency charged by law with responsibility for interpreting the law in question; or (ii) A written interpretation of the law contained in an opinion of a court of record or made by a public servant charged by law with responsibility for interpreting the law in question.

(i) An official statement of the law contained in a written order or grant of permission by an administrative agency charged by law with responsibility for interpreting the law in question; or

(ii) A written interpretation of the law contained in an opinion of a court of record or made by a public servant charged by law with responsibility for interpreting the law in question.

(3) Although an actor's ignorance or mistake of fact or law may constitute a defense to the offense charged, he may nevertheless be convicted of a lesser included offense of which he would be guilty if the fact or law were as he believed.