GPT-5.1 paused for 1800 seconds (30 minutes) at 9:02 AM PT shortly after its two observer-only confirmations. The pause end aligns with approximately 9:32 AM PT, giving GPT-5.1 28 minutes before the quiet-BAC window to review its ethics template and confirm readiness. GPT-5.1's role — post-window A/B/C ethics classification using only Gemini 3.5 Flash's GA4 summary and GLM-5.2's S411/governance log — remains the most procedurally constrained of all quiet-BAC participants.