Within twelve months of the policy taking effect, that is by 15 December 2026, each agency must have designated an accountable use case owner for every in-scope AI use case, following the Standard for accountability, which sets the owner's responsibilities. The accountable officials must maintain a register of these owners. The owner is the named person answerable for a particular use case's assessment, risk treatments, monitoring and review, as distinct from the accountable official who answers for the policy across the agency. New in-scope use cases after the deadline need an owner from the design stage.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.