Section 394ZA | Company joining tonnage tax group
From legislation.gov.uk
There is a relevant change in the relationship between A and a principal company of A on any day if—
(a)on that day A becomes a member of a tonnage tax group for the purposes of Schedule 22 to FA 2000 without entering tonnage tax on that day, or
(b)the day ends immediately before the day on which, for the purposes of that Schedule, A both becomes a member of a tonnage tax group and enters tonnage tax.