(1)In any case where—
(a)after any machinery or plant has become a fixture, a person (“the lessor”) who has an interest in the relevant land grants a lease, and
(b)apart from section 57, the lessor would be entitled, for the chargeable period related to the grant of the lease, to an allowance in respect of expenditure incurred on the provision of the fixture, and
(c)the consideration which the lessee gives for the lease is or includes a capital sum which, in whole or in part, falls to be treated for the purposes of this Part as expenditure on the provision of the fixture, and
(d)the lessor and the lessee make an election under this section,
then, subject to section 57, on and after the grant of the lease, the fixture shall be treated for the purposes of this Part as belonging to the lessee in consequence of his incurring expenditure as mentioned in paragraph (c) above.
(2)In any case where the lessor is not within the charge to tax, it shall be assumed that he is within that charge for the purpose of determining whether the condition in subsection (1)(b) above is fulfilled.
(3)An election under this section shall be made by notice to the inspector given within two years after the date on which the lease takes effect.
(4)No election may be made under this section if—
(a)the lessor and the lessee are connected with each other within the terms of section 839 of the principal Act; or
(b)it appears that the sole or main benefit which may be expected to accrue to the lessor from the grant of the lease and the making of an election is the obtaining of an allowance or deduction or a greater allowance or deduction or the avoidance or reduction of a charge under this Part.