Initial working draft text to amend UN R107 by inserting a new definition 2.49 for Child Restraint System and adding paragraph 7.7.8.7 to Annex 3 establishing requirements for Child Restraint Systems in vehicles of category M₂ and M₃. Requirements include fitting pictograms to ISOFIX-seating positions meeting UN R145 and UN R173, fitting pictograms to i-Size-seating positions meeting those same regulations, and prohibiting rearward-facing CRS in rearward-facing passenger seats with appropriate pictograms. Three new pictograms are added to Annex 4.

Proposed pictograms for CRS installation under UN R107 specify the following dimensions: ISOFIX pictograms with diameter 65 mm, i-Size pictograms with lateral size 65 mm, and RWF CRS in RWF adult seats pictograms with diameter 65 mm.

The document addresses how to define and measure effective seat belt webbing length for buses of category M₂/M₃. It proposes defining effective length by pulling the lap belt at the geometrical midpoint under a 60-degree angle to form an equilateral triangle, where the leg on the buckle side defines 50 percent of pursued effective length for 2-point belts and 25 percent for 3-point belts. Additional webbing for attachment, handling, connection to spool, and spool length must be added based on seat design and geometry. The proposal suggests the definition may work using diagonal belt alone in the ghost position and questions where to include it in UN R173.

ISOFIX position means a position satisfying regulation requirements to allow installation of ISOFIX child restraint systems as defined in UN R44 and UN R129. i-Size seating position means a seating position satisfying regulation requirements to allow installation of i-Size child restraint systems as defined in UN R129.

The agenda includes installation of belted child restraint systems, including seat belt minimum length feedback and definition of minimum effective belt length, installation of ISOFIX child restraint systems, amendments to UN R107, ISO pictogram wording revision and dimensions, clarification of the table for M₁ vehicles, introduction of seat belt length requirements for belted child restraint systems on M₂ and M₃ vehicles, amendments to UN R145, ISOFIX force reduction, and proposals to improve ISOFIX definitions across UN Regulations.