New Zealand Legislation: Regulations

21 Calculation of carbon stock

• (1) For the purposes of regulation 20, the carbon stock of a sub-area must be calculated by—

  • (a) using—

    • (i) tables 1 and 2 of Schedule 6 to calculate the carbon stock of the sub-area from growing trees (or where trees have been cleared as part of deforestation) (T₁); and

    • (ii) if relevant, tables 3 and 4 of Schedule 6 to calculate the carbon stock of the sub-area from above ground residual wood and below ground roots from any cleared trees that are to be treated as decaying on the land under regulation 22(h) (T₂); and

  • (b) adding together each of the figures for carbon stock referred to in subclause (1)(a) (T₁ + T₂).

  (2) The following formula must be used to calculate the carbon stock of a sub-area under subclause (1)(a)(i):

  A × C = T₁

  where—

  A

  is the area, in hectares, of land in the sub-area

  C

  is the figure for carbon stock per hectare from table 1 or 2 in Schedule 6 that reflects—

  • (a) the forest type of the sub-area; and

  • (b) the age of the trees; and

  • (c) if the forest type is Pinus radiata, the region in which the sub-area is located

  T₁

  is the carbon stock of the sub-area from growing trees (or where trees have been cleared as a part of deforestation), in tonnes of carbon dioxide.

  (3) The following formula must be used to calculate the carbon stock of a sub-area under subclause (1)(a)(ii):

  A × C × Y/10 = T₂

  where—

  A

  is the area, in hectares, of land in the sub-area

  C

  is the figure for carbon stock per hectare in the above ground residual wood and below ground roots from cleared trees from table 3 or 4 in Schedule 6 that reflects—

  • (a) the forest type of the residual wood decaying on the sub-area; and

  • (b) the age of the trees when cleared; and

  • (c) where the forest type cleared was Pinus radiata, the region in which the sub-area is located

  Y

  is 10 minus the number of years up to 10 since the trees were cleared

  T₂

  is the carbon stock of the sub-area from above ground residual wood and below ground roots from any cleared trees, in tonnes of carbon dioxide.

  (4) Application of the tables in Schedule 6 is subject to the rules in regulation 22.