Proposal to replace para. 9.3.2.8.1. and 9.3.2.9.1. to permit examination and verification of FTIR and QCL-IR analysers by type-approval authorities and designated technical services in addition to metrological institutes, preferably via witnessed testing at the instrument manufacturer’s premises, amend para. 9.3.9.2.2. to permit humidification techniques other than water bubblers and to clarify water concentration requirements for all fuels, and insert new Appendices 10 and 11 setting out a protocol for analyser assessment and a model certificate of acceptable analyser assessment.