(1)For the purposes of sections 910, 913 and 924, the general rule is that a company is to be regarded as not having incurred expenditure so far as it has been, or is to be, met (directly or indirectly) by—
(a)a public body, or
(b)a person other than the company.
(2)In this Chapter “public body” means the Crown or any government, local authority or other public authority (whether in the United Kingdom or elsewhere).
(3)The general rule does not apply to the expenses mentioned in section 913(2)(b) (incidental expenses incurred by a seller of patent rights).
(4)The general rule is subject to the exception in section 927.