Subsection (2) applies to sums which are in the hands of the trustee for civil recovery if they are—
The trustee is to make out of the sums—
and any sum which remains is to be paid to the enforcement authority.
The enforcement authority (unless it is the Scottish Ministers) may apply a sum received by it under subsection (2) in making payment of the remuneration and expenses of—
Subsection (3)(a) does not apply in relation to the remuneration of the trustee if the trustee is a member of the staff of the enforcement authority concerned (but it does apply in relation to such remuneration if the trustee is a person providing services under arrangements made by that enforcement authority).