Exempt technical data exports are certified by clearly marking the package or letter '22 CFR [exemption] applicable', with written certifications kept for five years (120.15(f)). Defense hardware sent by the U.S. Postal Service under a licence or exemption must be filed with CBP first and the package marked as subject to the ITAR, citing the exemption or licence number and that export information was filed; technical data sent by post under a licence must be notified to DDTC and the package marked accordingly (123.24). Some exemptions carry their own marking, for example '22 CFR 123.16(b)(2) applicable' on low-value spare parts shipping documents (123.16(b)(2)(vi)).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.