Tariff rate quota rules broaden safeguard measures to include quota allocation, carry forward, and developing country carve outs. Rules replace 'duty' with 'measure' and define safeguard measure to include safeguard duty, tariff rate quota and other measures; the Director General must determine serious injury based on objective, quantifiable factors and causal link to increased imports, and recommend the extent of measures. Tariff rate quota provisions require preserving traditional trade flows, allow global or country-specific quotas with allocations for substantially interested countries and a residual quota, permit carry-forward of unused quota, include a developing-country import-share carve-out, provide refund where final measure is lower than provisional duty, and mandate WTO notification and consultations.