Military Bases Agreement

Also known as: 1947 Military Bases Agreement · RP-US Military Bases Agreement · Agreement Concerning Military Bases · Military Bases Agreement of 1947 · MBA

Society

Definition

The Military Bases Agreement (MBA) — formally the Agreement Concerning Military Bases, signed at Malacañang in Manila on March 14, 1947 by Philippine President Manuel Roxas and United States Ambassador Paul V. McNutt — was the treaty under which the newly independent Republic of the Philippines granted the United States the right to retain, use, and occupy military, naval, and air bases at named sites in Philippine territory for a term of ninety-nine years. (FRUS 1947, Wikipedia — US bases) The agreement was concluded three days after the March 11, 1947 plebiscite that ratified the Parity Amendment — the twin instrument of the same 1947 settlement, an arc this wiki’s Parity Amendment entry documents from the constitutional side — and was registered with the United Nations as Treaty Series volume 43, number 673, its annex opening with Clark Field Air Base, Pampanga. (FRUS 1947, UN Treaty Series, Wikipedia — US bases)

The agreement’s life ran exactly through its amendment history: the 1966 Ramos–Rusk exchange of notes cut the 99-year term to 25 years, moving expiry from 2046 to 1991; the 1979 amendments affirmed Philippine sovereignty over the bases, installed Philippine base commanders, cut the American-administered areas, and introduced compensation — $500 million over five years; a 1983 amendment raised compensation to $900 million for the next five; and a 1988 Memorandum of Agreement, transmitted with President Ronald Reagan’s letter of October 17, 1988, settled the final compensation package. (Wikipedia — US bases, LawPhil — AO 100) The term expired in September 1991: the Philippine Senate rejected the successor RP–US Treaty of Friendship, Cooperation and Security by twelve votes to eleven on September 16, 1991, and the American withdrawal the agreement had governed was completed on November 24, 1992 — the record this wiki’s Subic Bay Naval Base and Anti-Base Movement entries carry. (LawPhil — Bayan v. Zamora, Wikipedia — Subic Bay)

Identities

Source	Identifier	URL
Wikipedia	N/A (no standalone article; the record is carried in United States bases in the Philippines)	https://en.wikipedia.org/wiki/United_States_bases_in_the_Philippines
Wikidata	United States bases in the Philippines (Q125554179) — the carrying item; no dedicated item for the treaty text located	https://www.wikidata.org/wiki/Q125554179
DBpedia	United_States_bases_in_the_Philippines — the carrying resource	https://dbpedia.org/page/United_States_bases_in_the_Philippines
ProductOntology	N/A	N/A
Wiktionary	N/A	N/A
Library of Congress Subject Headings (LCSH)	N/A	N/A
MeSH	N/A	N/A
NCBI Taxonomy	N/A	N/A
AGROVOC	N/A	N/A
Google Scholar	Military Bases Agreement 1947 Philippines United States Clark Subic Article XIII criminal jurisdiction 1979 amendments 1991 Senate rejection	N/A
ConceptNet	N/A	N/A
OpenCyc	N/A	N/A

Also Known As

1947 Military Bases Agreement
RP-US Military Bases Agreement
Agreement Concerning Military Bases
Military Bases Agreement of 1947
MBA

Examples and Analogies

A ninety-nine-year lease on the archipelago’s defenses: the term Roxas defended in his signing statement — “I have affixed my signature to an agreement which, I trust, for 99 years strengthens our national defense and assures the security of the Philippine Republic” — read the MBA as a fortress rental with a century horizon, its clock only later shortened to a generation. (FRUS 1947, Wikipedia — US bases)
The twin of parity: the MBA and the Parity Amendment were executed in the same week of March 1947 — the amendment at the plebiscite of March 11, the agreement at Malacañang on March 14 — one conceding military geography, the other economic rights, the pairing the 1971 Constitutional Convention record describes as a single program, as this wiki’s Parity Amendment entry documents. (FRUS 1947)
From landlord to guest: the 1979 amendments are remembered by the formula the Subic Bay record preserves — the United States shifting “from landlord to guest”: Philippine sovereignty over the bases affirmed, a Philippine commander designated at each installation, and the American-run perimeter cut from 244 to 63 square kilometers at Subic alone. (Wikipedia — US bases, Wikipedia — Subic Bay)
A treaty with a sunset built in twice: first at signature (99 years, to 2046), then by the 1966 revision (25 years, to 1991) — the second sunset made the Senate’s 1991 decision possible, converting an open-ended presence into a scheduled vote. (Wikipedia — US bases, LawPhil — Bayan v. Zamora)
Verified treaty data:
Signed: March 14, 1947, Manila, by President Manuel Roxas and Ambassador Paul V. McNutt (FRUS 1947)
Registered: United Nations Treaty Series, Vol. 43, No. 673, “Agreement Concerning Military Bases,” with annexes and exchange of notes (UN Treaty Series)
Term: 99 years from entry into force (Wikipedia — US bases, FRUS 1947)
Principal sites in the annex: Clark Field Air Base and Fort Stotsenberg (Pampanga); Subic Bay Northwest Shore Naval Base with the Olongapo and Baguio naval reservations (Zambales); Cañacao–Sangley Point Navy Base (Cavite); Camp John Hay (Baguio); the Leyte–Samar Naval Base; the Mariveles Military Reservation (Bataan); the Tawi Tawi Naval Anchorage; the Bagobantay transmitter area; and Loran stations in Palawan and Zambales — with further sites (Mactan, Floridablanca, Camp Wallace, Puerto Princesa, Aparri) available upon notice (Wikipedia — US bases, UN Treaty Series)
Criminal jurisdiction: Article XIII — United States jurisdiction over offenses committed on base regardless of the offender’s nationality (except offenses against Philippine security and cases where both parties were Philippine civilians); off base, United States jurisdiction over offenses by a member of its forces against another member, against United States security, or while in the actual performance of military duty; the Philippines retained the rest and the right to determine duty status (FRUS 1958–1960)
1966: Ramos–Rusk exchange of notes — term cut from 99 to 25 years (expiry 1991), United States control over Olongapo terminated, holdings limited to Clark, Sangley Point, Subic Bay, and Camp John Hay plus minor installations (Wikipedia — US bases)
1979: amendments — Philippine base commanders, reduced American-controlled areas, first compensation at $500 million for five years (Wikipedia — US bases, Wikipedia — Subic Bay)
1983: compensation raised to $900 million for the next five years (Wikipedia — US bases)
1988: Memorandum of Agreement amending the MBA, with Reagan’s accompanying letter of October 17, 1988; implemented administratively by Administrative Order No. 100 (December 2, 1988) (LawPhil — AO 100)
1991: Senate rejects the successor treaty 12–11 on September 16; agreement expires; withdrawal completed November 24, 1992 (LawPhil — Bayan v. Zamora, Wikipedia — Subic Bay)

Usage Scenarios

1. Teaching Treaty Law and Executive Agreements

The MBA is the standing Philippine case study in an instrument the two parties classified differently — ratified by the Philippine Senate as a treaty, treated by the United States as an executive agreement, as the separate opinions in Bayan v. Zamora recount — making it the teaching text for how domestic constitutional requirements can diverge across the same instrument. (LawPhil — Bayan v. Zamora)

2. Studying Criminal Jurisdiction over Foreign Forces

Scholars of visiting-forces law begin with Article XIII: the on-base/off-base jurisdictional split, the duty-status question, and the Philippine demand — pressed from the Magsaysay-era negotiations onward — for jurisdiction over off-duty offenses by American personnel against Filipinos form the doctrine the later Visiting Forces Agreement’s custody rules were built to answer. (FRUS 1958–1960)

3. Researching Base Conversion and the 1992 Transition

The agreement defines the legal baseline of the conversion era: the facilities it governed — Clark turned over November 26, 1991, Subic on November 24, 1992 — passed to the Philippine state under the Bases Conversion and Development Act of 1992, the record this wiki’s Subic Bay Naval Base, Clark Air Base, and Subic Bay Freeport Zone entries carry. (Wikipedia — US bases, Wikipedia — Subic Bay)

4. Analyzing the 1947 Settlement as a System

Historians of conditional sovereignty use the MBA together with the Parity Amendment and the Mutual Defense Treaty as one architecture — bases, resources, and a defense guarantee exchanged in the same independence settlement — the framework this wiki’s Parity Amendment and Mutual Defense Treaty entries document from their respective sides. (FRUS 1947, LawPhil — Bayan v. Zamora)

Strategies

Read the amendments, not just the signature: the operative MBA of any given year is the 1947 text as modified — 1966 (term), 1979 (sovereignty and compensation), 1983 (compensation), 1988 (final package) — so any legal question must first fix the date. (Wikipedia — US bases, LawPhil — AO 100)
Use the primary instruments: the registered treaty text in the UN Treaty Series, the Bayan v. Zamora narration, and the implementing Administrative Order No. 100 are all available online; secondary paraphrases routinely compress the amendment sequence. (UN Treaty Series, LawPhil — Bayan v. Zamora, LawPhil — AO 100)
Carry the 1991 variances attributed: the Senate vote of September 16, 1991 is the date of the Supreme Court’s narration and this wiki’s records, while other accounts print September 13; the withdrawal notice is dated December 27, 1991 in the Subic Bay record and December 6, 1991 in the basing record — attribute rather than resolve. (LawPhil — Bayan v. Zamora, Wikipedia — US bases, Wikipedia — Subic Bay)
Cross-reference, don’t duplicate: the anti-base campaign, the Magnificent 12, and the Freeport conversion are carried in full in this wiki’s Anti-Base Movement and Subic Bay entries; the present entry should carry the instrument, not relitigate the vote. (LawPhil — Bayan v. Zamora)

Security and Safety Measures

Jurisdictional rules as the safeguard for residents: Article XIII allocated prosecution power over offenses committed around the installations — the provision whose operation (American jurisdiction over on-base offenses, Philippine control of duty-status determinations) was the safety question for the communities around the bases, and whose renegotiation the Philippines pursued from the 1950s. (FRUS 1958–1960)
Command and sovereignty arrangements: the 1979 amendments — a Philippine commander at each base, American-controlled areas substantially reduced — functioned as the security-governance compromise that kept the alliance intact while asserting host-state authority, the model the record calls going “from landlord to guest.” (Wikipedia — US bases, Wikipedia — Subic Bay)
The sunset as constitutional protection: the shortened 25-year term guaranteed that the basing presence could not continue absent a new treaty concurred in by the Philippine Senate — the built-in mechanism that made the 1991 exit a scheduled decision rather than an open commitment. (Wikipedia — US bases, LawPhil — Bayan v. Zamora)
Orderly withdrawal planning: the endgame — Senate rejection, formal notice in December 1991, phased withdrawal completed November 24, 1992 — documents the exit management both governments practiced, the orderly handover this wiki’s Subic Bay Naval Base entry details. (Wikipedia — US bases, Wikipedia — Subic Bay)

Historical Context

Independence in July 1946 left the bases question open, and the settlement came in the same season as parity: with the plebiscite of March 11, 1947 out of the way, Roxas and McNutt signed the Military Bases Agreement at Malacañang on March 14, 1947, granting the United States a 99-year tenure over an annex of named installations — Clark and Fort Stotsenberg, Subic and its reservations, Sangley Point, Camp John Hay, the Leyte–Samar and Tawi Tawi naval sites, the Loran stations — with additional sites available on notice, and Article XIII allocating criminal jurisdiction with the on-base/off-base split that would preoccupy the alliance for four decades. (FRUS 1947, Wikipedia — US bases, FRUS 1958–1960) The Philippine Senate ratified the agreement as a treaty; the United States maintained it as an executive agreement — the asymmetry Bayan v. Zamora‘s separate opinions preserved for the record. (LawPhil — Bayan v. Zamora)

The amendments tracked Philippine nationalism’s slow accumulation of leverage. The September 1966 exchange of notes between Foreign Secretary Narciso Ramos and Secretary of State Dean Rusk cut the term from 99 years to 25, ending the leasehold in 1991 rather than 2046, and returned Olongapo to Philippine control. (Wikipedia — US bases) The 1979 amendments — the answer to years of protest over jurisdiction incidents — installed Philippine base commanders under affirmed sovereignty, cut the American-administered areas, and introduced compensation at $500 million for five years; the 1983 amendment raised the figure to $900 million; and the 1988 Memorandum of Agreement, with Reagan’s letter of October 17, 1988, assembled the final package — Economic Support Fund allocations, food commodities, conversion of unused Foreign Military Sales credits to grants — implemented on the Philippine side by Administrative Order No. 100 of December 2, 1988. (Wikipedia — US bases, Wikipedia — Subic Bay, LawPhil — AO 100)

The end ran through the Constitution’s treaty-concurrence requirement. Negotiations for a successor arrangement produced the draft Treaty of Friendship, Peace and Cooperation in July 1991; on September 16, 1991 the Senate rejected concurrence by twelve votes to eleven — the vote this wiki’s Anti-Base Movement entry documents in full, with Mount Pinatubo’s June 1991 eruption having destroyed Clark beforehand; the MBA expired with its term; and after the December 1991 notices, Clark was turned over on November 26, 1991 and the last American personnel left Subic on November 24, 1992. (LawPhil — Bayan v. Zamora, Wikipedia — US bases, Wikipedia — Subic Bay) The defense relationship continued under the 1951 Mutual Defense Treaty, rebuilt on new terms through the 1998 Visiting Forces Agreement — the succession the Supreme Court recounted in Bayan v. Zamora itself. (LawPhil — Bayan v. Zamora)

Challenges and Controversies

Criminal Jurisdiction Under Article XIII

The most durable grievance the agreement generated was jurisdictional: American authority over on-base offenses regardless of the offender’s nationality, and the duty-status screen for off-base offenses, left cases involving Filipino victims outside Philippine courts — the asymmetry the Philippines sought to renegotiate from the Magsaysay-era talks of the 1950s and the direct ancestor of the custody disputes litigated under the later Visiting Forces Agreement. (FRUS 1958–1960)

Compensation and the Renegotiation Sequence

Whether the payments of 1979 and 1983 and the 1988 package were rent for the bases or aid by another name was contested throughout — the record documents the figures ($500 million, $900 million, the 1988 assemblage of funds and financing) and the political dispute they never settled, ending only with the agreement itself. (Wikipedia — US bases, LawPhil — AO 100)

The 1991 Rejection and the Endgame

The Senate’s September 16, 1991 refusal of the successor treaty — twelve against eleven — remains the pivot of modern Philippine–United States relations, and its documentary edges carry variances this wiki reports rather than resolves: the vote date (September 16 in the Supreme Court’s narration and this wiki’s records; September 13 in some accounts), the successor treaty’s name (Treaty of Friendship, Cooperation and Security in the Court’s text; Treaty of Friendship, Peace and Cooperation in the basing record), and the withdrawal notice (December 27, 1991 in the Subic Bay record; December 6, 1991 in the basing record). (LawPhil — Bayan v. Zamora, Wikipedia — US bases, Wikipedia — Subic Bay)

Sovereignty and the Twin-Instrument Question

The MBA’s legitimacy was argued from signature onward: concluded three days after the conditioned parity plebiscite, in the same settlement that priced rehabilitation funds against constitutional amendment, it anchored the nationalist critique — the 1971 Constitutional Convention record’s “one program” verdict — while its defenders answered that a new republic without a navy needed the guarantee. The pairing with the Parity Amendment, and the mutual-defense bargain that followed in 1951, remain the framework in which the 1947 instruments are assessed. (FRUS 1947, LawPhil — Bayan v. Zamora)