287. No penal proceedings may be sustained if the accused establishes that he employed reasonable diligence by taking all the necessary precautions to ensure that this Act or the regulations were complied with.
Penal proceedings instituted against a merchant or an advertiser under Title II shall not be maintained if it is established that the offence alleged was committed only because the accused had reasonable grounds to rely on information given by the merchant or, as the case may be, the manufacturer.