(1) This section has effect where -
(a) a relevant company has a number of qualifying assets, and
(b) owing to the interlinked nature of the qualifying assets and their use in the specified trade, it would be reasonable to conclude that it would not be possible for the relevant company to identify the overall expenditure on each qualifying asset or the overall income from each qualifying asset.
(2) In subsection (3) "family of assets" means the smallest grouping of assets referred to in subsection (1) for which the expenditure and income referred to in that subsection can reasonably be identified.
(3) Where -
(a) this section has effect, and
(b) the relevant company opts for this Chapter to so apply,
then this Chapter shall apply, in relation to the relevant company, as if references to qualifying assets were references to a family of assets.