New START (2010) — Treaty Brief
Explore in-depth research on the New START Treaty (2010), its impact on nuclear arms reduction, verification measures, and global security cooperation efforts.
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Overview
The New Strategic Arms Reduction Treaty (New START) is a bilateral arms control agreement between the United States and the Russian Federation, signed in 2010. It aims to limit and reduce the two countries’ deployed strategic nuclear arsenals, promoting transparency and stability in their nuclear relationship. The treaty establishes verifiable limits on deployed intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and heavy bombers equipped for nuclear armaments. It also includes comprehensive verification measures such as on-site inspections, data exchanges, and notifications to ensure compliance. New START builds on previous arms control agreements by updating limits to reflect post-Cold War realities and advancing mutual trust through detailed monitoring mechanisms.
Key Obligations
- Limits on deployed strategic warheads: Each party must limit its deployed strategic nuclear warheads to no more than 1,550 (Article II).
- Limits on deployed and non-deployed delivery vehicles: The treaty caps deployed and non-deployed ICBMs, SLBMs, and heavy bombers equipped for nuclear armaments at 800 delivery vehicles (Article II).
- Verification and transparency measures: Includes up to 18 on-site inspections per year, data exchanges every six months on warhead and delivery vehicle inventories, and notifications of movements and test launches (Articles IV-VII).
- Notification requirements: Parties must notify each other of significant changes in their strategic forces, including new deployments, dismantlements, and test launches (Article VI).
- Data exchange and telemetry sharing: The treaty requires the exchange of telemetry data from missile tests to verify missile characteristics (Article VIII).
- Duration and extension: The treaty is valid for ten years, with the possibility of a five-year extension upon mutual agreement (Article XIV).
Signatories and Status
New START is a bilateral treaty between the United States and the Russian Federation, reflecting the two largest nuclear powers with the most extensive strategic arsenals. Both countries are the sole signatories and parties to the treaty. Other nuclear-armed states, including China, India, Pakistan, France, and the United Kingdom, are not parties to New START and are not bound by its terms. The treaty was ratified by both countries’ legislatures and entered into force in February 2011. Since then, it has been the cornerstone of U.S.-Russia nuclear arms control, succeeding the original START treaties and the SORT agreement. The treaty’s extension in 2021 for an additional five years was a significant development, reaffirming both parties’ commitment to arms control despite geopolitical tensions.
Major Controversies
- Verification and compliance concerns: While New START includes robust verification mechanisms, disputes occasionally arise over compliance. The U.S. has at times accused Russia of violating the treaty’s provisions, particularly regarding the deployment of certain missile systems that may not be covered by the treaty’s definitions. Russia has denied these allegations and raised its own concerns about U.S. compliance.
- Geopolitical tensions and treaty stability: The treaty’s future has been uncertain at times due to deteriorating U.S.-Russia relations, including disagreements over Ukraine, NATO expansion, and other security issues. These tensions have fueled debates about whether to extend or abandon the treaty.
- Non-inclusion of other nuclear states: Critics argue that New START’s bilateral nature limits its effectiveness in global nuclear arms control since other nuclear-armed states remain outside the framework. This exclusion complicates broader disarmament efforts and regional security dynamics.
- Potential loopholes: Some analysts point to ambiguities in treaty definitions—such as what constitutes a strategic delivery vehicle or warhead—that could be exploited to circumvent limits, especially with emerging technologies like hypersonic weapons.
Recent Developments
In the last five years, the most notable development was the 2021 extension of New START for five years, agreed upon by the Biden administration and the Russian government. This extension was widely seen as a crucial step to maintain strategic stability amid rising tensions and the absence of a broader arms control framework. Additionally, both sides have continued to conduct inspections and data exchanges, though the COVID-19 pandemic temporarily disrupted some verification activities. Discussions have also taken place regarding how to address new strategic weapons systems and whether to negotiate a follow-on treaty that includes other nuclear states or addresses emerging technologies. However, no new treaty has been formalized as of mid-2024.
Why It Matters Now
New START remains the last remaining formal arms control agreement between the United States and Russia, two nuclear superpowers whose strategic arsenals continue to pose global risks. Its verification regime provides critical transparency and predictability, reducing the risk of miscalculation or accidental escalation. As geopolitical tensions persist and new weapons technologies emerge, maintaining and potentially expanding arms control frameworks is essential for international security and nuclear risk reduction.
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