This Act shall apply to every unlimited company registered as a limited company in pursuance of the Companies Act, 1879, section fifty-seven of the Companies (Consolidation) Act, 1908, or section sixteen of the Companies Act, 1929, in the same manner as it applies to an unlimited company registered in pursuance of this Act as a limited company:
Provided that reference, express or implied, to the date of registration shall be construed as a reference, to the date at which the company was registered as a limited company under the said Act of 1879, the said section fifty-seven or the said section sixteen, as the case may be.