12The directors may from time to time make calls upon the members in respect of any moneys unpaid on their shares, provided that no call shall exceed one-fourth of the nominal amount of the share, or be payable at less than one month from the last call ; and each member shall (subject to receiving at least fourteen days' notice specifying the time or times of payment) pay to the company at the time or times so specified the amount called on his shares.
13The joint holders of a share shall be jointly and severally liable to pay all calls in respect thereof.
14If a sum called in respect of a share is not paid before or on the day appointed for payment thereof, the person from whom the sum is due shall pay interest upon the sum at the rate of five pounds per cent. per annum from the day appointed for the payment thereof to the time of the actual payment, but the directors shall be at liberty to waive payment of that interest wholly or in part.
15The provisions of these regulations as to payment of interest shall apply in the case of non-payment of any sum which, by the terms of .issue of a share, becomes payable at a fixed time, whether on account of the amount of the share, or by way of premium, as if the same had become payable by virtue of a call duly made and notified.
16The directors may make arrangements on the issue of shares for a difference between the holders in the amount of calls to be paid and in the times of payment.
17The directors may, if they think fit, receive from any member willing to advance the same all or any part of the moneys uncalled and unpaid upon any shares held by him ; and upon all or any of the moneys so advanced may (until the same would, but for such advance, become presently payable) pay interest at such rate (not exceeding, without the sanction of the company in general meeting, six per cent.) as may be agreed upon between the member paying the sum in advance and' the directors.