Parties shall quantitatively estimate the uncertainties in the data used for all source and sink categories using at least the tier 1 method, as provided in the IPCC good practice guidance.
14. 缔约方应按照气专委良好做法指导意见的规定，至少使用第一级方法对所有源和汇类别所用数据的不确定性作出量化估算。