7. If a person sells, or exposes or has in possession for sale or any purpose of trade or manufacture, any goods or things to which a false trade description is applied, he shall, unless he proves- (a) that, having taken all reasonable precautions against committing an offence against this section, he had at the time of the commission of the alleged offence no reason to suspect the genuineness of the trade description, and (b) that, on demand made by or on behalf of the prosecutor, he gave all the information in his power with respect to the persons from whom he obtained such goods or things, or (c) that otherwise he had acted innocently, be punished with imprisonment for a term which may extend to three months, or with fine which may extend to two hundred Taka, and in case of a second or subsequent conviction with imprisonment which may extend to one year, or with fine, or with both.