What is a draft section? AP-42 sections designated as 'final' have completed the public comment process and all issues have been resolved. Sections designated as 'draft' reflect the fact that the comment period on these sections has passed, but not all issues have been resolved. EPA might receive additional data or comments that would cause a re-evaluation of the available data and possibly open another comment period. Users are encouraged to use factors from finalized sections, if available , but may, at their discretion, decide that the draft emissions factors provide better estimates after reviewing the supporting documentation. 9/2013 Measurement Policy Group US EPA