Tonnage tax exclusion: anti abuse power to remove companies from the regime where transactions lack bona fide commercial purpose.
Clause 234(4)-(7) empowers the Assessing Officer to exclude a tonnage tax company by written order where transactions amount to an abuse of the tonnage tax scheme, operating retrospectively from the first day of the tax year in which the transaction was entered into; exclusion requires prior show cause notice and higher-level approval, and does not apply where the company satisfies the Assessing Officer that the transaction was a bona fide commercial arrangement not entered into for tax advantage.

Anti-abuse safeguards in tonnage tax: exclusion applies where arrangements produce tax advantages for non-eligible activities.
Clause 234(1)-(3) excludes the tonnage tax scheme where a tonnage tax company is party to any transaction or arrangement that constitutes an abuse by resulting, or that would but for the clause have resulted, in a tax advantage for persons other than the tonnage tax company or for the company in respect of its non-tonnage activities. "Tax advantage" includes manipulation of expense or interest allowances or cost allocation affecting non-tonnage income or loss, and transactions producing more than ordinary profits from tonnage tax activities.