(1)An authority to which this section applies may acquire and dispose of units or interests in units representing—
(a)a reduction in an amount of greenhouse gas emissions,
(b)the removal of an amount of greenhouse gas from the atmosphere, or
(c)an amount of greenhouse gas emissions allowed under a scheme or arrangement imposing a limit on such emissions.
(2)This section applies to—
(a)any Minister of the Crown or government department;
(b)the Scottish Ministers;
(c)the Welsh Ministers;
(d)any Northern Ireland department.
(3)If the Treasury acquire such units or interests in units, until they are disposed of they shall be treated as held by the persons for the time being constituting the Treasury.