It was decided that all states were to close the offices of the Taliban and Ariana Afghan Airlines; freeze the assets of Osama bin Laden and those associated with him; prevent the supply of acetic anhydride; and prohibit aircraft to land, take off or overfly their territory if it had taken off and was to land in Taliban territory.[3] The aircraft restrictions would not apply to humanitarian flights and the Committee of the Security Council was requested to maintain a list of approved humanitarian organisations providing humanitarian aid to Afghanistan. A travel ban was also imposed on senior Taliban officials which would not apply in religious or humanitarian circumstances.