"merger" means any arrangement where - (a) the controlling interest in the entities of all or substantially all of 2 or more separate groups are brought under the ownership of a single entity or group to form a single group, or (b) the controlling interest in an entity that is not a member of any group is brought under the ownership of another entity or group to form a single group;
"demerger" means any arrangement where the entities of a group are separated into 2 or more groups that are no longer consolidated by the same ultimate parent entity in its consolidated financial statements.
(2) Where 2 or more groups merge to form a single group (in this subsection referred to as a 'merged group') in any of the 4 consecutive fiscal years immediately preceding a fiscal year, for the purposes of the consolidated revenue test the revenue of the merged group shall be deemed to be greater than the consolidated revenue threshold for any fiscal year prior to the merger
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