4. The secretariat introduced GRPE-81-04 and GRPE-81-05 presenting guidelines for this session of GRPE held virtually and the proceedings for the decision taken during the session. Furthermore, the WP.29 secretariat informed the GRPE that there will be no interpretation available during the meeting and that the virtual meeting included a ‘silence procedure’ of ten days during which Contracting Parties (CPs) can react on the proposals in the three languages (Annex VIII of the session report).