Australia is moving to adopt UN R155 and R156 as draft ADR 115 and ADR 116. Neither says where the back end that operates a connected fleet runs, who administers it, or under whose law it can be compelled. Fortify Labs: the drafts "still don't address where the back-end infrastructure is located, who has access to it, or who maintains it." Copying a UN regulation gets you type approval, not an answer to which jurisdiction holds your telemetry.
https://hvia.asn.au/call-for-impact-analysis-on-proposed-cyber-regs/
Heavy Vehicle Industry AustraliaCall For Impact Analysis On Cyber Regs - Heavy Vehicle Industry AustraliaHVIA members have expressed support for harmonising Australian Design Rules with the current United Nations Regulations on Cyber Security and Software Update, but have raised concerns about significant compliance costs.