Questions concerning cyber security amendments for approvals of STU submitted by the expert from Japan that address timing of working document submission to GRVA, whether Part II components may include certificated base vehicle equipment under UN R155 multi-stage categorization, whether STU definition includes ECUs within base vehicle E/E architecture, examination of use cases and implementation challenges, consistency of applicant terminology between Section 3.3.1 and Section 7.6, whether approval authorities for Parts I, II, and III must be identical, clarification of end of support period requirements in para. 2.7(b), installation agreement requirements in para. 5.1.2.1(d), and whether total Cyber Security Risk Assessment Process for whole vehicle with other equipment than ESAs is necessary after ESA installation under para. 7.4.10.