In the application of this Act to existing companies, it shall apply in the same manner—
(a)in the case of a limited company, other than a company limited by guarantee, as if the company had been formed and registered under this. Act as a company limited by shares;
(b)in the case of a company limited by guarantee, as if the company had been formed and registered under this Act as a company limited by guarantee; and
(c)in the case of a company other than a limited company, as if the company had been formed and registered under this Act as an unlimited 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 under the Joint Stock Companies Acts, the [25 & 26 Vict. c. 89.] Companies Act, 1862, the Companies (Consolidation) Act, 1908, or the Companies Act, 1929, as the case may be.