Proposal to amend para. 2.27. to define ISOFIX position as a position satisfying requirements of UN R145 to allow installation of ISOFIX child restraint systems as defined in UN R44 and UN R129, amend para. 2.36. to define i-Size seating position as a seating position satisfying requirements of UN R145 to allow installation of i-Size child restraint systems as defined in UN R129, insert new para. 2.48. defining minimum effective seat belt length, insert new para. 5.1.11. specifying minimum seat belt lengths for M₂ and M₃ vehicles, amend para. 5.2.1. to establish requirements for seating positions of M₁, M₂, M₃ and N₁ vehicles suitable for various child restraint systems and require M₁ vehicles to provide child restraint system installation information, amend para. 5.2.2. to remove reference to manufacturer recommendation, insert new para. 11.3. establishing transitional provisions applicable from the official entry into force date and from 1 September 2030, and insert new Annex 8 specifying measurement methodology for minimum effective seat belt length.