Madrid 1983 29 The participating States reaffirm the need that refraining from the threat or use of force, as a norm of international life, should be strictly and effectively observed. To this end they stress their duty, under the relevant provisions of the Final Act, to act accordingly. The participating States condemn terrorism, including terrorism in international relations, as endangering or taking innocent human lives or otherwise jeopardizing human rights and fundamental freedoms and emphasize the necessity to take resolute measures to combat it. They express their determination to take effective measures for the prevention and suppression of acts of terrorism, both at the national level and through international co-operation including appropriate bilateral and multilateral agreements, and accordingly to broaden and reinforce mutual co-operation to combat such acts. They agree to do so in conformity with the Charter of the United Nations, the United Nations Declaration on Principles of International Law concerning Friendly Relations and Co-operation among States and the Helsinki Final Act. In the context of the combat against acts of terrorism, they will take all appropriate measures in preventing their respective territories from being used for the preparation, organization or commission of terrorist activities, including those directed against other participating States and their citizens. This also includes measures to prohibit on their territories illegal activities of persons, groups and organizations that instigate, organize or engage in the perpetration of acts of terrorism. The participating States confirm that they will refrain from direct or indirect assistance to terrorist activities or to subversive or other activities directed towards the violent overthrow of the regime of another participating State. Accordingly, they will refrain, inter alia, from financing, encouraging, fomenting or tolerating any such activities. They express their determination to do their utmost to assure necessary security to all official representatives and persons who participate on their territories in activities within the scope of diplomatic, consular or other official relations. They emphasize that all the participating States recognize in the Final Act the universal significance of human rights and fundamental freedoms, respect for which is an essential factor for the peace, justice and well-being necessary to ensure the development of friendly relations and co-operation among themselves, as among all States. The participating States stress their determination to promote and encourage the effective exercise of human rights and fundamental freedoms, all of which derive from the inherent dignity of the human person and are essential for his free and full, development, and to assure constant and tangible progress in accordance with the Final Act, aiming at further and steady development in this field in all participating States, irrespective of their political, economic and social systems. They similarly stress their determination to develop their laws and regulations in the field of civil, political, economic, social, cultural and other human rights and fundamental freedoms;