Document ID: chunk:federal_register_of_legislation:F2021L01696:clause:1_9:p1
Version: federal_register_of_legislation:F2021L01696
Segment Type: clause
Provision Reference: sch 1 cl 9 (pt 1/3)
Character Range: 132382–134838

9  Working out the change in soil organic carbon stock for a CEA
 (1) If, pursuant to section 15 of this determination, the change in soil organic carbon stock for a reporting period for a CEA with a specified probability of exceedance is worked out using Schedule 1, then that change must be worked out using equation 69.
 (2) In working out the change in soil organic carbon stock for a reporting period for a CEA with a specified probability of exceedance:
 (a) both Divisions 4 and 5 of this Schedule must be applied to the 0-30 cm layer of a sample from the CEA; and
 (b) both Divisions 4 and 5 of this Schedule must be applied to both the 0-30 cm and 0-x cm layers of the samples from the CEA if:
 (i) land management activities disturb the soil deeper than 20 centimetres (where x must equal or exceed the depth of disturbance plus 10 centimetres); or
 (ii) the project proponent elects to account for soil organic carbon changes for the 0-x cm layer of the samples from the CEA; or
 (iii) after applying an estimate under equation 69 to the 0-x cm layer, the corresponding change in soil organic carbon stock in the 30-x cm layer in the CEA calculated is negative as determined by subsection (3); and
Note: Project proponents may elect to sample and account for changes in the 30-x cm layer, unless they are required to account for it under the circumstances listed in paragraph (2)(b). Accounting for the 30-x cm layer can make it more difficult to detect changes in the 0-30 cm layer due to potentially slower rates of change in the deeper layer and the effect of baseline carbon stocks on the standard error terms in equation 69. This subsection allows the 30-x cm layer to be monitored for soil organic carbon increases but accounting to occur just for the 0-30 cm layer, unless negative changes occur in the 30-x cm layer which then requires the 30-x cm layer to be included in accounting to prevent over-crediting.
 (c) if Divisions 4 and 5 of this Schedule are applied to the 0-x cm layer of a sample from the CEA—the change in organic in soil organic carbon stock for a CEA for equation 69 is deemed to be the value for the 0-x cm layer of the sample, not the 0-30 cm layer.
Note: Crediting is based on the whole soil profile (0-x cm layer). Crediting can be based on only the 0-30 cm layer if permitted by this section. This is intended to allow results of the 30-x cm layer to only contribute to crediting once changes are observed in the