At COP27, countries are supposed to agree on high-level principles on requirements for developing/assessing potential future Article 6.4 crediting methodologies.   As a rule, methodologies should focus on activity types that are compatible with a 1.5°C future, and in sectors that are suited to carbon crediting. It is important to recognise that some sectors are not suited for this, such as those where there is a high risk of non-permanence or a high level of uncertainty when it comes to quantifying impact. There should be no carbon crediting methodology for fossil-fuel related activities, such as increasing the efficiency of fossil-fuel powered energy generation, or reducing leaks from fossil fuel transport. Instead of “filtering” all existing methodologies, the 6.4 Supervisory Body should instead focus on identifying key elements that should be extracted from these, i.e. the best practice elements, and construct new methodologies on the basis of the best elements of the existing ones.