law: The Joint-stock Companies Act, 1857
  XI. Effect of registration.-
  Upon any such Memorandum of Association, either with or without Articles of Association as aforesaid, being registered, the Registrar shall certify under his hand that the Company is incorporated, and, in the case of a limited Company, that the Company is limited; the subscribers of the Memorandum of Association, together with such other persons as may from time to time become shareholders in the Company, shall thereupon be a body corporate by the name prescribed in the Memorandum of Association, having a perpetual succession and a common seal, with power to hold land, but with such pecuniary liability on the part of the shareholders as is hereinafter mentioned: the certificate of incorporation given by the Registrar shall be conclusive evidence that all the requisitions of this Act in respect of registration have been complied with; and the date of such certificate shall be deemed to be the date of the incorporation of the Company.