(1) It shall be the duty -
(a) of all officers, shareholders, employees and agents of an investment business firm or other body the affairs of which are being investigated under section 66 or 73 of this Act, including officers, shareholders and agents outside the State, and
(b) of any other person, including those being investigated under section 67 of this Act, and including any person outside the State, who the inspector considers is, or may be, in possession of any information concerning the affairs of an investment business firm,
to produce to an inspector appointed under section 66 or 73 of this Act all books, accounts, deeds, records or other documents of, or relating to, the business of the investment business firm or person being investigated under section 67 of this Act, which are in their control, possession or procurement, to attend before the inspector, when required to do so, and, otherwise, to give to him all assistance in connection with the investigation which they are
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