(1) Every company shall cause minutes of all proceedings of general meetings and (where there are directors or managers) of its directors or managers to be entered in books kept for that purpose.
(2) Any such minute if purporting to be signed by the chairman of the meeting at which the proceedings were had, or by the chairman of the next succeeding meeting, shall be evidence of the proceedings.
(3) Until the contrary is proved, every general meeting of the company or meeting of directors or managers in respect of the proceedings whereof minutes have been so made shall be deemed to have been duly held and convened, and all proceedings had thereat to have been duly had, and all appointments of directors, managers, or liquidators, shall be deemed to be valid.