(1) Income from investments shall not be relevant shipping income, and for this purpose 'income from investments' includes any income chargeable to tax under Case III, IV or V of Schedule D or under Schedule F.
(2) To the extent that an activity gives rise to income from investments it shall not be regarded as part of a company's tonnage tax activities.
(3) Subsection (1) shall not apply to income that is relevant shipping income under sections 697H.