b. Enhanced characterization
For an enhanced livestock characterization, Parties must collect, in addition to the information needed for the single characterization, the following:

• Disaggregation of livestock into sub-categories reflecting country-specific variations in age and sex structure and animal performance (animal or feed characteristics);
• Livestock population by sub-category;
• Feed intake estimates for a typical animal in each sub-category (used in the calculation of Tier 2 emission factors for CH₄ from enteric fermentation for cattle, buffalo, and sheep, and CH₄ from Manure Management).

The estimates of feed intake used to estimate CH₄ from enteric fermentation should be consistent to the estimated manure and nitrogen excretion rates that are used to estimate CH4 and N₂O emissions from manure management and direct and indirect N₂O agricultural soil emissions.