(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.