Onus of proving limits of what is practicable, etc :
Section – 104A. In any proceeding for an offence for the contravention of any provision of this Act or rules made thereunder consisting of a failure to comply with a duty or requirement to do something, it shall be for the person who is alleged to have failed to comply with such duty or requirement, to prove that it was not reasonably practicable or, as the case may be, all practicable measures were taken to satisfy the duty or requirement.