by the United Nations, United Nations Security Council Resolution 320
“ Reaffirms its decision that sanctions against Southern Rhodesia (Zimbabwe) shall remain fully in force until the aims and objectives set out in resolution 253 (1968) are completely achieved;2. Calls upon all States to implement fully all Security Council resolutions establishing sanctions against Southern Rhodesia (Zimbabwe) , in accordance with Article 25 and Article 2, paragraph 6, of the Charter of the United Nations;3. Urges the United States of America to co-operate fully with the United Nations in the effective implementation of sanctions ”
