8In section 44 (further provisions in relation to joint lessees in cases involving new expenditure), after subsection (4) there shall be inserted the following subsection—
“(5)For the purposes of the application of this section to any expenditure to which section 22 applies by virtue of subsection (3B) of that section, this section shall have effect as if—
(a)references to section 43(2) included references to section 43(4);
(b)references to a normal writing-down allowance included references to a first-year allowance; and
(c)the reference in subsection (2) above to the separate item of machinery or plant referred to in section 43(3)(a) were, in relation to a first-year allowance, a reference to the machinery or plant in respect of which, in accordance with section 43(4), that allowance is or is treated as made.”