Proposal to amend para. 3.5.1. to include dual-fuel engines of Type 1A with hydrogen as gaseous fuel, amend para. 4.12.3.3.7. to establish a series of digits identifying dual-fuel engine types in the approval mark, insert new definitions for ‘Instrument manufacturer’ and ‘Type of analyzer’ in Annex 4 para. 3.1., insert new symbols and abbreviations in Annex 4 paras. 3.4. and 3.5., amend paras. 7.6.6., 7.7.4., and 8.1.1. to accommodate H₂O measurement and hydrogen engine calculations, amend para. 8.4.2.1., amend para. 8.6.2. to exclude CH₄ calculation when measured by FTIR or QCL-IR, amend para. 9.3.1.8. regarding gas drying, amend para. 9.3.2. to introduce FTIR and QCL-IR analyzers for CO, CO₂, CH₄, and NOx measurement with specifications in paras. 9.3.2.8. and 9.3.2.9., insert new para. 9.3.2.10. for independent analyzer assessment, amend para. 9.3.9. and para. 9.3.9.2.2. regarding interference effects and water quench checks, insert new paras. 9.3.9.5. and 9.3.9.6. for FTIR and QCL-IR interference checks, amend Annex 4 Appendix 2 para. A.2.1.2., amend Annex 4 Appendix 5 para. A.5.2., insert new Annex 4 Appendix 9 establishing procedure for H₂O measurement, insert new Annex 4 Appendix 10 for FTIR and QCL-IR analyzer assessment protocol, insert new Annex 4 Appendix 11 establishing model certificate for analyzer assessment, amend Annex 8 Appendix 1 paras. A.1.1., A.1.2.2., A.1.3.2.1., A.1.4.1., and A.1.4.3. for Type 1A hydrogen dual-fuel engines, amend Annex 15 paras. 4.2.2.3., 6.1., 10.3., and Appendix 4 paras. A.4.3.1., A.4.4.1.1., A.4.4.3.1., and A.4.4.3.3.