13. Any company constituted by special statute may, by by-law, reduce its share capital in any way, and, in particular, without prejudice to the generality of the foregoing power, may:(1) extinguish or reduce the liability on any of its shares in respect of share capital not paid-up; or
(2) either with or without extinguishing or reducing liability on any of its shares, cancel any paid-up share capital which is lost or unrepresented by available assets; or
(3) either with or without extinguishing or reducing liability on any of its shares, pay off any paid-up share capital which is in excess of the wants of the company;
and may reduce the amount of its share capital and of its shares accordingly.