SDCL § 37-25A-6: Offer or sale without knowledge of order revoking or denying exemption.

No person is considered to have violated § 37-25A-7 by reason of any offer or sale effected after the entry of an order under § 37-25A-5 if he establishes that he did not know and, in the exercise of reasonable care, could not have known, of the order.