A fill-in working checklist for trade compliance teams preparing for the BIS Affiliates Rule. Covers what the rule actually does (aggregation across owners and across lists, cascade/carry-forward, the rule of most restrictiveness, and why exactly 50% is in while below 50% is not automatically out), what is stayed and what is in effect now, where ownership data typically breaks, and a six-phase preparation list from scoping through governance. The stay is set to end on 9 November 2026 "absent a future extension"; in September 2026 the US and China announced an extension to 10 January 2027, which had not been published in the Federal Register as of 5 October 2026 — so the sheet is built to work whichever way it goes. Based on primary sources (90 FR 47201, 90 FR 50857, 15 CFR, and China's Ministry of Commerce). Designation is a regulatory classification, not a judgement about a company; final determinations rest with your export-control officer and the authorities' current guidance.