Safeguard duty review: Director General must assess necessity and recommend continuation or withdrawal within prescribed timeframe. The Director General must periodically review the necessity of continued imposition of safeguard duty under section 8C, recommending continuation to prevent or remedy market disruption or recommending withdrawal if unjustified; mid-term review is required where imposition exceeds three years; reviews must be completed within the prescribed statutory timeframe, and rules 5, 6, 7 and 11 apply mutatis mutandis to review proceedings.