text: 20. The General Assembly calls upon all Governments, irrespective of any other differences, to unite in action against the crime of apartheid and to take vigorous and concerted measures in implementation of United Nations resolutions to isolate the apartheid régime and assist the oppressed people of South Africa and their liberation movements until they attain freedom. 21. The General Assembly calls upon all Governments, in particular: A. Diplomatic, consular and other official relations (a) To terminate diplomatic, consular and other official relations with the racist régime of South Africa, or to refrain from establishing such relations; B. Military and nuclear collaboration (b) To implement fully the arms embargo against South Africa without any exceptions or reservations and, in this connexion: (i) To refrain from the sale and shipment of arms, ammunition of all types and any vehicles or equip­ ment for use of the armed forces and paramilitary organizations in South Africa; (ii) To refrain from the sale and shipment of equipment and materials for the manufacture and maintenance of arms, ammunition and military vehicles and equip­ ment in South Africa; (iii) To refrain from the supply of spare parts for vehicles and equipment used by the armed forces and paramilitary organizations in South Africa; (¡v) To revoke any licences or patents granted to the racist régime of South Africa or to South African companies for the manufacture of arms, ammunition and military vehicles and equipment and to refrain from granting such licences and patents; (v) To prohibit investment in, or technical assistance for, the manufacture of arms and ammunition, air­ craft, naval craft and other military vehicles and equipment in South Africa; (vi) To terminate any existing military arrangements with the racist régime of South Africa and to refrain from entering into any such arrangements; 
analysis: The text appears to be a call to action by the General Assembly, urging governments to take measures to isolate the apartheid regime in South Africa and support the liberation movements. The focus is on diplomatic, military, and economic actions, suggesting that the category should be related to international relations, politics, or human rights.