38The baseline
(1)In this Part, the “baseline” means the aggregate amount of net Welsh emissions of greenhouse gases for the baseline years.
(2)The baseline year for each greenhouse gas is—
(a)carbon dioxide: 1990;
(b)methane: 1990;
(c)nitrous oxide: 1990;
(d)hydrofluorocarbons: 1995;
(e)perfluorocarbons: 1995;
(f)sulphur hexafluoride: 1995;
(g)nitrogen trifluoride: 1995.
(3)The Welsh Ministers may by regulations amend subsection (2) to—
(a)specify the baseline year for a greenhouse gas added by regulations under section 37(2);
(b)modify the baseline year for a greenhouse gas.
(4)The Welsh Ministers may make provision under subsection (3)(b) only if they are satisfied that it is appropriate to do so as a result of significant developments in EU or international law or policy relating to climate change.