(1)Where the Central Government is satisfied that as a result of the transfer of any share or block of shares of a company, a change in the controlling interest of the company is likely to take place and that such change would be prejudicial to the interests of the company or to the public interest, that Government may direct the company not to give effect to the transfer of any such share or block of shares, and-(a)where the transfer of such share or block of shares has already been registered, not to permit the transferee or any nominee or proxy of the transferee, to exercise any voting or other rights attaching to such share or block of shares; and(b)where the transfer of such share or block of shares has not been registered, not to permit any nominee or proxy of the transferor to exercise any voting or other rights attaching to such share or block of shares.