Where—
the value for the purposes of this Act of that interest and of any other interest in land comprised in that estate and sold within that period by the person making the claim acting in the same capacity shall, subject to the following provisions of this Chapter, be its sale value.
A claim under this Chapter must be made not more than 4 years after the end of the period mentioned in subsection (1)(a).
Subsection (1) above shall not apply to an interest if its sale value would differ from its value on death by less than the lower of—
Subsection (1) above shall not apply to an interest if its sale is—
and for the purposes of this subsection a person shall be treated as having in the property comprised in an unadministered estate (within the meaning of section 91(2) above) the same interest as he would have if the administration of the estate had been completed.