21. Where an offence under this Act is committed by a body of persons, then
(a) if that body is a body corporate, every director of the body corporate shall be deemed to be guilty of that offence; and |
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(b) if that body is a firm, every partner of that firm shall be deemed to be guilty of that offence: |
| Provided, however, that no such director or partner shall be deemed to be guilty of an offence under this Act, if he proves that such offence was committed without his knowledge, or that he exercised all due diligence to prevent the commission of that offence. |