Section 22 of the Principal Act is amended -

(a) by the insertion of the following subsection after subsection (3):

"(3A) Where, on completion of a full investigation in relation to a merger or acquisition -

(a) that has been put into effect without the Commission having issued a determination under section 21(2)(a) or 22(3)(a) or (c), and

(b) that is a merger or acquisition -

(i) to which paragraph (a) or (b) of section 18(1) applies, or

(ii) that has been notified to the Commission in accordance with section 18(3), 18(3A) or 18A(1),

the Commission finds that the result of the merger or acquisition will be to substantially lessen competition in markets for goods or services in the State, the Commission may -

(I) determine that the merger or acquisition should be unwound or dissolved, and the manner in which such unwinding or such dissolution shall occur, including through the dissolution of the merger or the disposal of all the shares or assets acquired, so as to restore the situation prevailing prior to the merger or acquisition being put into effect, or