5.—(1) The Department may by regulations amend section 1, 3 or 4 so as to specify—
(a)for a particular emissions target, an earlier year than that for the time being specified;
(b)for a particular year, a higher percentage than that for the time being specified.
(2) The Department may by regulations amend this Part so as to impose a duty on the Northern Ireland departments to ensure that the net Northern Ireland emissions account for a specified year is at least a specified percentage lower than the baseline.
(3) See section 54 for restrictions on the powers conferred by subsections (1) and (2).