Sovereignty Limited by
International Law and Treaties

This Court notes and appreciates the ferocity and passion by which petitioners stressed their arguments on this issue. However, while sovereignty has traditionally been deemed absolute and all-encompassing on the domestic level, it is however subject to restrictions and limitations voluntarily agreed to by the Philippines, expressly or impliedly, as a member of the family of nations. Unquestionably, the Constitution did not envision a hermit-type isolation of the country from the rest of the world. In its Declaration of Principles and State Policies, the Constitution "adopts the generally accepted principles of international law as part of the law of the land, and adheres to the policy of peace, equality, justice, freedom, cooperation and amity, with all nations." ⁴³ By the doctrine of incorporation, the country is bound by generally accepted principles of international law, which are considered to be automatically part of our own laws. ⁴⁴ One of the oldest and most fundamental rules in international law is pacta sunt servanda — international agreements must be performed in good faith. "A treaty engagement is not a mere moral obligation but creates a legally binding obligation on the parties . . . A state which has contracted valid international obligations is bound to make in its legislations such modifications as may be necessary to ensure the fulfillment of the obligations undertaken." ⁴⁵

By their inherent nature, treaties really limit or restrict the absoluteness of sovereignty. By their voluntary act, nations may surrender some aspects of their state power in exchange for greater benefits granted by or derived from a convention or pact. After all, states, like individuals, live with coequals, and in pursuit of mutually covenanted objectives and benefits, they also commonly agree to limit the exercise of their otherwise absolute rights. Thus, treaties have been used to record agreements between States concerning such widely diverse matters as, for example, the lease of naval bases, the sale or cession of territory, the termination of war, the regulation of conduct of hostilities, the formation of alliances, the regulation of commercial relations, the settling of claims, the laying down of rules governing conduct in peace and the establishment of international organizations. ⁴⁶ The sovereignty of a state therefore cannot in fact and in reality be considered absolute. Certain restrictions enter into the picture: (1) limitations imposed by the very nature of membership in the family of nations and (2) limitations imposed by treaty stipulations. As aptly put by John F. Kennedy, "Today, no nation can build its destiny alone. The age of self-sufficient nationalism is over. The age of interdependence is here." ⁴⁷

UN Charter and Other Treaties
Limit Sovereignty

Thus, when the Philippines joined the United Nations as one of its 51 charter members, it consented to restrict its sovereign rights under the "concept of sovereignty as auto-limitation." ⁴⁷-A Under Article 2 of the UN Charter, "(a)ll members shall give the United Nations every assistance in any action it takes in accordance with the present Charter, and shall refrain from giving assistance to any state against which the United Nations is taking preventive or enforcement action." Such assistance includes payment of its corresponding share not merely in administrative expenses but also in expenditures for the peace-keeping operations of the organization. In its advisory opinion of July 20, 1961, the International Court of Justice held that money used by the United Nations Emergency Force in the Middle East and in the Congo were "expenses of the United Nations" under Article 17, paragraph 2, of the UN Charter. Hence, all its members must bear their corresponding share in such expenses. In this sense, the Philippine Congress is restricted in its power to appropriate. It is compelled to appropriate funds whether it agrees with such peace-keeping expenses or not. So too, under Article 105 of the said Charter, the UN and its representatives enjoy diplomatic privileges and immunities, thereby limiting again the exercise of sovereignty of members within their own territory. Another example: although "sovereign equality" and "domestic jurisdiction" of all members are set forth as underlying principles in the UN Charter, such provisos are however subject to enforcement measures decided by the Security Council for the maintenance of international peace and security under Chapter VII of the Charter. A final example: under Article 103, "(i)n the event of a conflict between the obligations of the Members of the United Nations under the present Charter and their obligations under any other international agreement, their obligation under the present charter shall prevail," thus unquestionably denying the Philippines — as a member — the sovereign power to make a choice as to which of conflicting obligations, if any, to honor.

Apart from the UN Treaty, the Philippines has entered into many other international pacts — both bilateral and multilateral — that involve limitations on Philippine sovereignty. These are enumerated by the Solicitor General in his Compliance dated October 24, 1996, as follows:

(a) Bilateral convention with the United States regarding taxes on income, where the Philippines agreed, among others, to exempt from tax, income received in the Philippines by, among others, the Federal Reserve Bank of the United States, the Export/Import Bank of the United States, the Overseas Private Investment Corporation of the United States. Likewise, in said convention, wages, salaries and similar remunerations paid by the United States to its citizens for labor and personal services performed by them as employees or officials of the United States are exempt from income tax by the Philippines.

(b) Bilateral agreement with Belgium, providing, among others, for the avoidance of double taxation with respect to taxes on income.

(c) Bilateral convention with the Kingdom of Sweden for the avoidance of double taxation.

(d) Bilateral convention with the French Republic for the avoidance of double taxation.

(e) Bilateral air transport agreement with Korea where the Philippines agreed to exempt from all customs duties, inspection fees and other duties or taxes aircrafts of South Korea and the regular equipment, spare parts and supplies arriving with said aircrafts.

(f) Bilateral air service agreement with Japan, where the Philippines agreed to exempt from customs duties, excise taxes, inspection fees and other similar duties, taxes or charges fuel, lubricating oils, spare parts, regular equipment, stores on board Japanese aircrafts while on Philippine soil.

(g) Bilateral air service agreement with Belgium where the Philippines granted Belgian air carriers the same privileges as those granted to Japanese and Korean air carriers under separate air service agreements.

(h) Bilateral notes with Israel for the abolition of transit and visitor visas where the Philippines exempted Israeli nationals from the requirement of obtaining transit or visitor visas for a sojourn in the Philippines not exceeding 59 days.

(i) Bilateral agreement with France exempting French nationals from the requirement of obtaining transit and visitor visa for a sojourn not exceeding 59 days.

(j) Multilateral Convention on Special Missions, where the Philippines agreed that premises of Special Missions in the Philippines are inviolable and its agents can not enter said premises without consent of the Head of Mission concerned. Special Missions are also exempted from customs duties, taxes and related charges.

(k) Multilateral convention on the Law of Treaties. In this convention, the Philippines agreed to be governed by the Vienna Convention on the Law of Treaties.

(l) Declaration of the President of the Philippines accepting compulsory jurisdiction of the International Court of Justice. The International Court of Justice has jurisdiction in all legal disputes concerning the interpretation of a treaty, any question of international law, the existence of any fact which, if established, would constitute a breach "of international obligation."

In the foregoing treaties, the Philippines has effectively agreed to limit the exercise of its sovereign powers of taxation, eminent domain and police power. The underlying consideration in this partial surrender of sovereignty is the reciprocal commitment of the other contracting states in granting the same privilege and immunities to the Philippines, its officials and its citizens. The same reciprocity characterizes the Philippine commitments under WTO-GATT.

International treaties, whether relating to nuclear disarmament, human rights, the environment, the law of the sea, or trade, constrain domestic political sovereignty through the assumption of external obligations. But unless anarchy in international relations is preferred as an alternative, in most cases we accept that the benefits of the reciprocal obligations involved outweigh the costs associated with any loss of political sovereignty. (T)rade treaties that structure relations by reference to durable, well-defined substantive norms and objective dispute resolution procedures reduce the risks of larger countries exploiting raw economic power to bully smaller countries, by subjecting power relations to some form of legal ordering. In addition, smaller countries typically stand to gain disproportionately from trade liberalization. This is due to the simple fact that liberalization will provide access to a larger set of potential new trading relationship than in case of the larger country gaining enhanced success to the smaller country's market. ⁴⁸

The point is that, as shown by the foregoing treaties, a portion of sovereignty may be waived without violating the Constitution, based on the rationale that the Philippines "adopts the generally accepted principles of international law as part of the law of the land and adheres to the policy of . . . cooperation and amity with all nations."