For example, the sanctions ban luxury goods without defining them.
The sanctions also ban travel by Uzbek officials directly involved in the Andijon crackdown to the 25 members of the European Union.
The new sanctions would also ban the sale to Libya of equipment used in oil refineries and transportation.
The original sanctions banned all trade and financial dealings with Iraq and occupied Kuwait, except for the provision of medicine.
The sanctions banned all trade and financial resources except for medicine and "in humanitarian circumstances" foodstuffs, whose import into Iraq was tightly regulated.
The proposed sanctions being debated in Congress would ban the making or holding of any investments in South Africa.
The sanctions ban trade and financial transactions with the joint venture and freeze any assets it has placed in United States banks.
Because American sanctions ban most business and academic ties, infiltrating spies under what is known as nonofficial cover is difficult.
Colonel Qaddafi drove to Egypt because the sanctions ban air travel to or from Libya.
In previous cases, sanctions have banned the supply of petroleum and petroleum products and transport equipment.