Background
745.The general conditions as to availability of plant and machinery allowances are in section 11. Subsection (4)(a) says that expenditure on the provision of plant or machinery has to be wholly or partly for the purposes of the qualifying activity. This Chapter explains how allowances are computed if use is only “partly”.
746.The idea is that allowances should be restricted in a “ just and reasonable” way having particular regard to the extent to which the plant or machinery is used for purposes other than those of the qualifying activity. In practice this means that allowances are reduced proportionately for non-qualifying use (for example, private use in the case of a sole trader).
747.It would be impossible to achieve the correct adjustment if the expenditure was pooled with expenditure on other plant or machinery. So this Chapter requires a single asset pool. For rules about pooling in general see Chapter 5. Section 54(2) contains the rule that a single asset pool cannot contain expenditure relating to more than one asset.
