For the purposes of this Chapter, a settlement is a "protected settlement" if it commenced before 10 December 2014 and either condition A or condition B is met.
Condition A is met if there have been no transfers of value by the settlor on or after 10 December 2014 as a result of which the value of the property comprised in the settlement was increased.
Condition B is met if—
there has been a transfer of value by the settlor on or after 10 December 2014 as a result of which the value of the property comprised in the settlement was increased, and
that transfer of value was the transfer of value under section 4 on the settlor's death before 6 April 2017 and it had the result mentioned by reason of a protected testamentary disposition.
In subsection (3)(b) "protected testamentary disposition" means a disposition effected by provisions of the settlor's will that at the settlor's death are, in substance, the same as they were immediately before 10 December 2014.