For the purposes of this Act, if:
(a) an amount of greenhouse gas was emitted from the operation of a landfill facility; and
(b) waste was accepted by the landfill facility before 1 July 2012;
so much of the amount mentioned in paragraph (a) as is, under a determination under subsection 10(3) of the National Greenhouse and Energy Reporting Act 2007 , taken to be attributable to waste accepted by the facility before 1 July 2012 is a legacy emission from the operation of the landfill facility.