This section applies if a person ("P") makes a disposal and acquisition which—
is a ring fence reinvestment, and
qualifies for section 153 relief.
P may make a claim under this section in relation to the disposal and acquisition.
If P makes a claim under this section—
section 153(1)(a) applies in relation to P and the disposal, but
section 153(1)(b) does not apply to P and the acquisition.