75. Unless the terms of payment for shares are determined by contract, the board of directors may call for payment of all or part of the unpaid amounts on shares subscribed or held by the shareholders, in the manner, if any, prescribed by the by-laws.
A call for payment is deemed to be made on the day the board of directors passes a resolution providing for it. Notice of the call for payment stating the amount due and the time for payment must be sent to the shareholders.