For the purposes of this section the qualifying condition is that the National Crime Agency has reasonable grounds to suspect that—
If the qualifying condition is satisfied the National Crime Agency may serve on the Board a notice which—
Service of a notice under subsection (2) vests in the National Crime Agency the Revenue inheritance tax functions in relation to the settlement for the period.
the National Crime Agency—
Service of a notice under subsection (4) divests the National Crime Agency of the Revenue inheritance tax functions in relation to the settlement for the period.
The vesting of a function in the National Crime Agency under this section does not divest the Board or an officer of the Board of the function.
It is immaterial whether the settlement is commenced or a charge to tax arises or a period or any part of it falls before or after the passing of this Act.