; (ii) the amount sold; and (iii) the factual basis, if any, for the knowledge or belief that such a sale resulted in a violation of paragraph (1). (5) Definition In this section: (A) The term behind the counter means, with respect to a binary explosive, that customers do not have direct access to the product before the sale is made at a retail location. (B) The term retail location means a location at which a seller sells a binary explosive in limited, small quantities or amounts, and not in gross. (C) The term sales form means the form the prospective purchase of a binary explosive fills out with the name and address of such purchaser and the amount of binary explosive being purchased. . 3. Definition Section 841 of title 18, United States Code, is amended by adding at the end the following: (u) Binary explosive means a substance that, when combined with another substance— (1) results in explosive material; and (2) has as its primary or common purpose to function by explosion through target practice using a firearm. .