The revision of the guidelines for N2O chamber methodologies will be published as a series of (open access) papers in a special section of the Journal of Environmental Quality. There will be nine papers in total, each covering a specific aspect. Five of the papers have NZ lead-authors and these have all been submitted to the ROI process for approval. The remaining four have international lead-authors, and this ROI submission includes draft for these remaining four so that MPI can approve these as well. All papers have been submitted to the journal and are in various stages of acceptance. For time purposes, and to enable any changes to be made following MPI feedback, we include the submitted versions of the papers here.  