A fill-in checklist for chemical-weapon precursors and chemicals: Japan (Appended Table 1 Row 3 + the goods ordinance; the legal test is substance name + concentration above 30%, with CAS as a matching key), the CWC (Schedules 1/2/3), the Australia Group, the US EAR (1C350), and the SDS-to-classification workflow. With a plain-language intro. Based on primary sources (e-Gov, METI, OPCW, 15 CFR); final decisions rest with the current text and your export-control officer.