40. The expert from the UK introduced GRRF-76-03 containing the list of acronyms contained in the UN Regulations under the responsibility of GRRF. The expert from the UK noted that “VSF” was used in GRRF as “Vehicle Stability Function” while in GRSP as “V. Seat Fixture”

41. The expert from Denmark reported on complaints received from road user’s and truck drivers associations stating that there can be too much air pressure transmitted to the semi-trailer resulting in unnecessary tell-tale activation and asked whether other experts received similar comments. GRRF agreed that more information was needed on this issue and invited experts to consider whether similar concerns existed in their national territories.

57. Following the suggestion of the WP.29, the secretariat introduced GRRF-78-04 containing a list of definitions in the Regulations under the responsibility of GRRF. The Chair of GRRF recalled GRRF-76-03 and noted that no follow-up action was defined. The secretariat announced that it was looking for a central and suitable location on the website to collect this useful information.

51. The secretariat recalled the ongoing discussion on definitions, acronyms, abbreviations and symbols used in regulations. The secretariat announced that the relevant documents (based on GRRF-76-03 and GRRF-78-04) were added to the definitions page on the WP.29 website.

66. The secretariat reported that GRSP was using the abbreviation “VSF” as “Vehicle Seat Fixture” and proposed to stop using “VSF” as “vehicle stability function”. GRRF didn’t support this idea as “VSF” was not only used as an abbreviation but also VSF is part of an approval mark for certain vehicles type-approved according to Regulation No. 13.