Post EGM shipping bill cancellation enables customs to block export incentives for returned cargo after manifest filing. System-based cancellation facility in ICES is introduced for export cargo returned from international waters due to closure of the Strait of Hormuz. The new AC-role option, 'Post EGM SB Cancellation', enables the proper officer to mark a Shipping Bill for cancellation even after filing of the Export General Manifest. The mechanism prevents disbursal of export incentives where benefits have not yet been scrolled, stops pending incentive scrolls from being generated after cancellation, and requires manual recovery action where scrolls were already generated before cancellation.