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Which law gave US, Israel authority to attack Iran, kill its leader: Omar Abdullah

March 03, 2026 6 min read International Relations Polity & Governance GS2 (International Relations Governance and Constitutionalism)
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What Happened

  • The US and Israel launched joint military strikes on Iran in late February 2026, including strikes on nuclear facilities and the killing of Iran's Supreme Leader, raising immediate questions about the domestic legal authority under which these operations were conducted.
  • Under the US Constitution, the power to declare war rests with Congress (Article I, Section 8), while the President, as Commander-in-Chief (Article II, Section 2), has authority over the conduct of military operations — a long-standing tension in American constitutional law.
  • Legal experts assessed that no existing congressional authorisation covers military action against Iran: the 2001 AUMF (targeting Al-Qaeda and Taliban) and the 2002 AUMF (targeting Saddam Hussein's Iraq) do not legally extend to Iran.
  • The White House invoked presidential inherent authority under Article II and the argument of self-defence/preventive action (Iran's alleged nuclear weapons development), but legal scholars widely challenged this framing.
  • The War Powers Resolution of 1973 requires the President to notify Congress within 48 hours of military action and limits deployments to 60-90 days without specific congressional approval — compliance remains disputed.
  • For Israel, legal authority was similarly contested: Israeli law requires Cabinet approval for war; the constitutional and legal framework governing Israeli strike authority (emergency powers under Israeli Basic Laws) came under scrutiny.

Static Topic Bridges

The US War Powers Resolution (1973) and the Congressional War Power

The War Powers Resolution (WPR) was enacted by the US Congress on November 7, 1973 — over President Nixon's veto — in response to the executive branch's unilateral expansion of military operations during the Vietnam War. The Resolution seeks to balance the constitutional tension between Congress's power to declare war (Article I, Section 8, Clause 11) and the President's role as Commander-in-Chief (Article II, Section 2). Under the WPR, the President must: (1) consult with Congress before introducing US forces into hostilities; (2) notify Congress within 48 hours; and (3) terminate military action within 60 days (extendable to 90 days for withdrawal) unless Congress declares war, specifically authorises the action, or extends the deadline.

  • War Powers Resolution: Public Law 93-148; enacted November 7, 1973; passed over Nixon's veto.
  • Constitutional authority for Congress to declare war: Article I, Section 8, Clause 11 (US Constitution).
  • Commander-in-Chief clause: Article II, Section 2 (US Constitution) — gives President command authority once war is authorised.
  • WPR compliance issues: Every President since 1973 has argued the WPR is an unconstitutional infringement on executive war powers; no President has formally acknowledged WPR's limits as legally binding.
  • 60-day clock: The WPR gives the President 60 days to conduct operations; after that, Congress must authorise or the President must withdraw. The 2026 Iran strikes triggered a new 60-90 day countdown debate.
  • Historical precedent: Reagan's Grenada invasion (1983), Clinton's Kosovo bombing (1999), Obama's Libya operations (2011), Trump's Syria strikes (2017, 2018) — all conducted without formal war declarations.

Connection to this news: The 2026 Iran strikes represent the most consequential application of presidential war powers since the 2003 Iraq invasion — the absence of a specific Iran AUMF means the legal basis is contested, with significant implications for US democratic accountability and international law.

Authorization for Use of Military Force (AUMF) and the War on Terror Framework

After the September 11, 2001 terrorist attacks, Congress passed the Authorization for Use of Military Force (AUMF 2001) on September 18, 2001 — just seven days after the attacks. The 2001 AUMF authorised the President to use "all necessary and appropriate force" against those who "planned, authorized, committed, or aided" the 9/11 attacks and those who "harbored" them. This became the legal foundation for the US 'War on Terror' — used to justify operations in Afghanistan, Pakistan, Yemen, Somalia, Syria, and elsewhere. A second AUMF in October 2002 specifically authorised military force against Iraq (Saddam Hussein's government). Neither AUMF covers Iran, which was not implicated in 9/11 and is a separate nation from al-Qaeda's operational base.

  • AUMF 2001: S.J.Res.23, Public Law 107-40; signed September 18, 2001; authorises force against "nations, organisations, or persons" that planned/aided 9/11.
  • AUMF 2002: S.J.Res.46, Public Law 107-243; authorised force against Iraq; declared "mission accomplished" by Bush in 2003; formally repealed by Congress in March 2024.
  • Scope debates: Successive administrations expanded AUMF 2001's scope to cover ISIS, al-Shabaab (Somalia), al-Qaeda in Arabian Peninsula (AQAP) — all without specific new AUMFs.
  • Iran nexus argument: Some US officials argued Iran's support for Hezbollah and Hamas (designated terrorist organisations) provides a link; legal scholars rejected this as insufficient to cover direct state-on-state military action against Iran.
  • Congressional debate: Multiple proposals for an Iran-specific AUMF were rejected in Congress in 2019-2020; renewed debate erupted in 2026 when strikes actually occurred.

Connection to this news: The legal vacuum created by the absence of an Iran-specific AUMF has forced the US administration to rely on inherent Article II powers and broader national security arguments — a constitutionally contested position that sets a dangerous precedent for executive unilateralism in conflict-initiation.

International Law and the Use of Force: UN Charter Framework

Under international law, the use of force by one state against another is governed primarily by the UN Charter. Article 2(4) prohibits the threat or use of force against the territorial integrity or political independence of any state. Exceptions are provided in Article 51 (inherent right of individual or collective self-defence against an armed attack) and Chapter VII (Security Council authorisation). The 2026 US-Israeli strikes on Iran, without a UNSC authorisation and contested self-defence justification (Iran had not launched a conventional armed attack prior to the strikes), raised fundamental questions about the legality under international law.

  • UN Charter Article 2(4): General prohibition on use of force; cornerstone of post-WWII international order.
  • Article 51: Allows self-defence only against "armed attack" — pre-emptive or preventive strikes against potential future threats are not clearly covered by the article's text.
  • Caroline Doctrine (1837): Established the standard for anticipatory self-defence: the threat must be "instant, overwhelming, and leaving no choice of means" — a customary international law standard still referenced in UN debates.
  • Nuremberg Principles (1946): Established that "crimes against peace" (waging aggressive war) are punishable — the counterargument is that aggression is defined under the Rome Statute of the International Criminal Court (ICC).
  • India's position: Consistently advocates for UN-mandated or diplomatically resolved conflicts; has opposed unilateral use of force; abstained on UN resolutions criticising/endorsing the Iran strikes.

Connection to this news: The US-Israeli strikes expose the enduring tension between realpolitik security calculations and the international legal order — a tension India navigates carefully, as a country that has itself faced threats of unilateral military action and depends on international law as a foundational protection.

Key Facts & Data

  • War Powers Resolution: Enacted November 7, 1973 (over Nixon's veto); requires Congressional notification within 48 hours; 60-day operational limit
  • AUMF 2001: Signed September 18, 2001; authorises force against 9/11 planners/harborers; does not cover Iran
  • AUMF 2002 (Iraq): Signed October 16, 2002; Congress formally repealed it in March 2024
  • US Constitution: Article I, Section 8 — Congress declares war; Article II, Section 2 — President is Commander-in-Chief
  • UN Charter Article 2(4): Prohibits use of force against territorial integrity of states
  • UN Charter Article 51: Self-defence exception — requires prior "armed attack"
  • Caroline Doctrine (1837): Pre-emptive self-defence must meet "instant, overwhelming, no choice of means" standard
  • International Criminal Court (ICC) Rome Statute: Defines crime of aggression (Article 8 bis); entered into force for state parties in 2018
  • Iran's NPT status: Signatory (Non-Nuclear Weapon State); subject to IAEA safeguards