This paper provides the agenda and logistical information for the March 2026 WG21 pre-meeting administrative teleconference scheduled for March 9, 2026. It includes teleconference connection details, a list of active subgroups and their chairs, and agenda items covering status reports from logistics, specialist, design, and wording subgroups. No technical proposal is made; the document serves purely as an administrative organizing document for WG21 committee coordination.