(1B)Where not less than twenty-five per cent of the paid-up share capital of a public company, having share capital, is held by a private company, the private company shall,-(a)on and from the date on which the aforesaid percentage is first held by it after the commencement of the Companies (Amendment) Act, 1974 , or(b)where the aforesaid percentage has been first so held before the commencement of the Companies (Amendment) Act, 1974, on and from the expiry of the period of three months from the date of such commencement, unless within that period the aforesaid percentage is reduced below twenty-five per cent of the paid-up share capital of the public company, become, by virtue of this sub-section, a public company, and thereupon all other provisions of this section shall apply thereto:Provided that even after the private company has so become a public company, its articles of association may include provisions relating to the matters specified in clause (iii) of sub-section (1) of section 3 and the number of its members may be, or may at any time be reduced, below seven.]