Highlights

• January 1, 2027: DFARS 252.225-7052 expands to full mine-to-magnet traceability for NdFeB/SmCo magnets, tantalum, and tungsten, but U.S.-funded projects won't achieve practical readiness until 2028-2030, creating a critical compliance gap.
• China's 90%+ control of heavy rare earth processing (especially dysprosium and terbium) combined with export licensing creates a structural choke point that cannot be bypassed by waivers alone, forcing reliance on nonavailability determinations and stockpiling.
• Defense primes like Lockheed Martin and RTX face opaque tier-2/tier-3 supplier exposure with False Claims Act risk, while lawful workarounds require waivers, qualified stockpiles, allied capacity, magnet recycling, and system redesign before the 2027 deadline.

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The looming January 1, 2027 shift in DFARS clause 252.225-7052 (“Restriction on the Acquisition of Certain Magnets, Tantalum, and Tungsten” (opens in a new tab)) is not a small compliance tweak: it expands from a midstream restriction to an entire mine-to-finished-material restriction for covered magnets (NdFeB and SmCo) and for tantalum and tungsten, including upstream steps such as mining, refining, separation, melting, and production in “covered countries.” 

The underlying statute (10 U.S.C. §4872 (opens in a new tab)) applies to prime contracts and subcontracts “at any tier” and defines “covered material” to include NdFeB magnets, SmCo magnets, tungsten metal powder, tungsten heavy alloy (and components), tantalum metals/alloys, and molybdenum. 

This is a “cliff” because, through December 31, 2026, the magnet restriction is largely framed around alloying/melting and subsequent magnet production; beginning January 1, 2027, it explicitly reaches back to raw feedstock and processing. 

Why U.S.-funded mine-to-magnet projects may miss practical readiness by 2027

Officially, U.S. Department of Defense messaging has been confident: DoD stated in March 2024 that it had awarded billions (including potential milestone payments) in the aggregate since 2020 across the rare earth supply chain and that it was “on track” to meet a mine-to-magnet goal supporting all U.S. defense requirements by 2027.

A May 2024 Reuters report (opens in a new tab) similarly quoted the same 2027 goal. 

However, the critical bottleneck for DFARS 2027 compliance is heavy rare earth (HREE) separation and downstream magnet-grade materials qualified for defense, not simply mining.  The Center for Strategic and International Studies assessed in 2025 that no heavy rare-earth separation was occurring in the United States at that time, even as a DoD-backed capability buildout was underway. 

Concrete project schedules reinforce the risk: MP Materials has disclosed that its second U.S. magnet facility (“10X Facility”) is expected to begin commissioning in 2028, not by 2027.  Multiple Rare Earth Exchanges™ reports likewise described magnet production starting in 2028 for a major planned U.S. facility.

The net implication for 2027 is “no progress,” but rather: even optimistic buildouts can leave a gap between statutory compliance and physical availability of qualified non-China HREE-derived magnet inputs, especially under wartime procurement acceleration. 

China’s export-control ratchet and the heavy rare earth choke point

The central scenario risk we have flagged—“what if China tightens controls?”—has already been stress-tested in public reporting and analysis. The People's Republic of China imposed export restrictions on seven rare earth elements and magnets (including dysprosium and terbium) requiring special export licenses.

Two dynamics matter for defense supply-chain outcomes:

First, HREEs are structurally concentrated. China accounted for ~99% of global heavy REE processing until 2023, and that disruption elsewhere can effectively recreate monopoly conditions. 

Second, controls can reach beyond raw materials. Rare Earth Exchanges has described an escalation where China’s export controls can require licensing for “parts, components, and assemblies” containing Chinese-sourced rare earth materials or produced using Chinese rare earth technologies, widening the blast radius from upstream commodities into downstream manufactured goods.

Independent commodities reporting from S&P Global adds that “dual-use” licensing has continued to constrain exports to the U.S. and allied military end users, and that ex-China HREE bottlenecks are expected to persist through 2026 and 2027 as alternative suppliers are constructed and commissioned. 

This creates a hard truth for policymakers: even if DFARS were softened administratively (via waivers), Chinese licensing can still choke physical supply, especially for the most defense-critical HREEs.

Will DoD “extend DFARS,” and what is more likely than a formal extension

A key legal constraint: DoD has stated in the final rule’s Federal Register record that the effective dates are expressly set in statute, and “DoD cannot implement any other effective dates.”  Does this mean a true “deadline extension” would likely require Congress (e.g., an NDAA amendment), not just a policy decision inside DoD?

What DoD can do—without changing the statute—is already embedded in law and implementation:

• Nonavailability determinations (opens in a new tab): the final rule notes that DoD can issue nonavailability determinations when compliant suppliers are not available, and DFARS authorizes both individual and class nonavailability determinations. 
• National security waivers (opens in a new tab): 10 U.S.C. §4872 allows acceptance of delivery of an end item containing covered material manufactured in a covered nation if necessary to national security, with written determination requirements and congressional notification timing. 
• Exceptions already in statute/DFARS (opens in a new tab), including limited COTS and recycled-material pathways (important for magnet recycling strategies).

Given the combination of statutory rigidity, known project timelines, and persistent HREE bottlenecks, the most likely outcome is not a clean“extension,” but rather a patchwork: targeted nonavailability determinations + program-specific waivers + accelerated stockpiling + selective redesign and substitution where feasible. 

What top defense contractors are disclosing publicly

Using Defense News’s Top 100 as a proxy for the prime contractor universe, enforcement pressure will concentrate on the largest U.S. primes—but their disclosures remain thin and generalized, because the true exposure sits deeper, embedded across opaque tier-2 and tier-3 supplier networks. Obviously, much of this topic involves national security and ensuing classified status, so this limits how much information is available to the public.

But to show the clearest public signal:

Lockheed Martin (opens in a new tab) explicitly flags “rare earth minerals” as scarce raw materials (opens in a new tab) and states it is working with U.S. Government customers and suppliers on phasing in regulatory requirements to transition rare earth minerals and magnets to secure/compliant sources—while warning that verifying compliance “down to the mining level” within required timeframes is a continuing challenge across its multi-tier supplier base. 

RTX (opens in a new tab) (Raytheon) discloses that supply-chain disruptions have affected its ability to procure raw materials including “certain rare earth elements (opens in a new tab),” and that it has pursued mitigations such as second/third supply alternatives and increased inventory—framing the issue explicitly in the context of geopolitical conflict, sanctions, export controls, and persistent constraints. 

Across the broader defense ecosystem, Rare Earth Exchanges reporting emphasizes the scale problem: with 2027 mine-to-magnet traceability becoming a legal requirement, a single noncompliant upstream input can invalidate a defense component/contract, and “False Claims Act exposure” becomes a live risk if origin cannot be proven. 

Likely outcomes and compliant “workarounds” under intensified conflict conditions

Rare Earth Exchanges’ March 2026 assessment frames the hardest materials reality: DoD Dy+Tb demand may exceed ~100 tonnes annually while DFARS-qualifying supply is far smaller, and compliant separated supply may be absent for several HREEs used in specialized applications.  

Combine that with S&P’s expectation (opens in a new tab) of 2026–2027 HREE bottlenecks and China’s licensing leverage, and a conflict-driven procurement surge could translate into delays, cost spikes, and selective program disruption rather than an orderly transition. 

Project Vault matters here, but it is not a magic bypass. Rare Earth Exchanges has described the Project Vault as a public-private stockpile initiative backed by up to $10B in Export-Import Bank of the United States financing, with participants paying commitment fees for access during disruptions; it also notes there are no predetermined geographic restrictions and that “some materials may be sourced from China” where alternatives do not exist at scale—meaning it can cushion shocks but not eliminate China exposure in the near term.  

Rare Earth Exchanges has also underscored the governing constraint: warehousing upstream ore is strategically inert if midstream processing and qualifying capacity are missing, and poorly coordinated buying could crowd out defense-relevant midstream capacity. 

On “gray market” access via third countries, Rare Earth Exchanges has some network chatter that this occurs to get product (REEs and select critical minerals) out of China. Not much more can be delineated.

What can be said at a high level is that transshipment risk rises when bottlenecks and dual-use controls intensify, but DFARS’ core enforcement lever is documentation and traceability—failure to prove origin can mean termination and legal exposure, not just a failed audit. 

Thepractical, lawful workaround set therefore converges on fivenecessities: (1) class/program waivers or nonavailability determinations where physically unavoidable (opens in a new tab); (2) stockpiling in the usable form factors (qualified oxides/metals/alloys/magnets), not just ore; (3) allied capacity plus long-term offtakes that finance ex-China HREE throughput; (4) accelerated magnet recycling pathways that can qualify under statutory exceptions; and (5) redesign/substitution efforts that reduce Dy/Tb intensity without requalifying entire systems under crisis timelines. 

Supply Chain Overview

A recent March 20th entry in Rare Earth Exchanges finds that the U.S. defense industrial base has entered a structural risk phase driven by rare earth supply chain dependency; China is leveraging its controls (90%+) of processing and magnet production and is increasingly exploiting that dominance through export controls and trade pressure.

With new DFARS rules taking effect in 2027 requiring full mine-to-magnet traceability, defense contractors such as the ones cited above (Lockheed Martin, RTX), plus other major players like Northrop Grumman, face escalating compliance and supply risks embedded deep within opaque, multi-tier supplier networks.

At the same time, Western production capacity will not meaningfully scale until the late 2020s or early 2030s, creating, according to Rare Earth Exchanges, a dangerous gap as demand for advanced military systems accelerates amid rising geopolitical tensions. Signals are already emerging—declining U.S.-bound exports from China, project cancellations in Europe, price volatility, and supply rationing—indicating tightening constraints.

The core insight: rare earths are not just another input but a functional dependency, and the real challenge is not simply securing supply, but achieving full-chain visibility, certification, and resilience before disruptions cascade into defense readiness failures.  Rare Earth Exchanges has been clear that existing industrial policy in America and the West is nowhere near sufficient to overcome these crises.