# Congress authorises conditional Virginia submarine transfers to Australia

Date: 2023

## Verdict / Western stakes — PROVEN
On 22 December 2023 [President Joe Biden](/people/env-person-joe-biden) signed the National Defense Authorization Act for Fiscal Year 2024, Public Law 118-31, after Congress enacted provisions enabling a future sale of Virginia-class nuclear-powered attack submarines to Australia under AUKUS. Congress did not order the immediate delivery of a boat. The statute created conditional legal authority for up to two transfers from the US Navy inventory and not more than one additional sale under another authorised channel, subject to timing and national-security findings. This was a decisive gate for the San Diego Optimal Pathway announced nine months earlier. Australia gained a credible statutory route toward acquiring American submarines; the US Navy, Congress and submarine yards retained protections against transfers that would undercut American readiness. American and Australian taxpayers face large purchase, replacement and industrial-base costs, while shipbuilders and defence suppliers may gain contracts.

## Legal record and numerical limits
The enacted legislation contains the AUKUS Submarine Transfer Authorization Act provisions now codified at 22 U.S.C. § 10431. Transfer authority for up to two submarines from Navy inventory begins one year after 22 December 2023, and the statute provides a 20-year window for no more than one additional sale under the specified Arms Export Control Act route. The scope must be distinguished from the wider political intention to obtain at least three and potentially as many as five Virginia-class boats, depending on future agreements and law. The statutory authority does not itself set a fixed sales price, assign hull identification numbers or certify which ships will be retired or replaced. Congress also included requirements protecting American naval capacity and rules for expenditure of Australian contributions to the US submarine industrial base.

## Who decides and who can veto
Congress defined the authority and safeguards. The US president must make required determinations and certifications before covered transfers, including that sufficient US submarine capacity will be maintained. The Navy controls the condition and availability of individual boats and is constrained by shipyard construction rates, maintenance backlogs and nuclear workforce shortages. Australia can fund industrial improvements, prepare crews and negotiate purchase details but cannot unilaterally require the US to release a submarine. Shipbuilders are indispensable suppliers, not statutory decision-makers. The British government has a central role in the longer-term SSN-AUKUS design but is not the seller of these particular Virginia boats. Formal presidential or congressional safeguards cannot be replaced by a news announcement.

## Money, access and public burden
An authorisation to sell is not an appropriation paying for an Australian hull. The Australian government must finance any purchase through defence budgets, including crew training, base support, reactor servicing and lifetime sustainment. The United States may need to fund additional submarine procurement to prevent a gap in its own fleet. AUKUS industrial-base contributions from Australia are separate from the sale price unless specifically applied under the governing arrangements. US shipyards and workers may benefit from orders and capacity expansion, while American taxpayers bear opportunity costs if scarce nuclear-qualified labour is diverted from naval priorities. Australian taxpayers bear the risk of exchange rates, delayed ship transfers and extending older Collins-class submarines.

## Timeline
- September 2021: leaders launch AUKUS.
- March 2023: Optimal Pathway envisages early-2030s Virginia-class sales.
- December 2023: Congress passes and Biden signs the FY2024 NDAA.
- 22 December 2024: one-year statutory commencement threshold for specified transfer authority.
- February 2025: Australia makes first US submarine industrial-base contribution.
- 2025–2026: continuing production, policy review and implementation conditions affect timing.

## Strongest counter-view
Supporters say conditional authorisation gives Canberra a foundation for planning while preserving the US Navy's ability to defend national security. Critics argue the law cannot overcome a shortage of hulls, skilled workers or dry docks, and may create expectations that American production cannot meet. Both are credible observations. The proven event is congressional and presidential enactment of a conditional sale pathway, not the completion of a sale.

## Open questions and watch
Follow construction output, presidential statutory certifications, US fleet readiness, defence appropriations, Australian payment accounting and the final sale documentation. Separate the statute's maximum initial authorisation from broader political forecasts for five boats. The legal text, not projected delivery schedules, controls the power to transfer.

## Related on Factrail
- [Facts](https://factrail.ai/facts)
- [Drivers](https://factrail.ai/drivers)

## Sources
- [US Government Publishing Office — FY2024 NDAA enacted law](https://www.govinfo.gov/content/pkg/PLAW-118publ31/html/PLAW-118publ31.htm)
- [US House Office of the Law Revision Counsel — 22 USC 10431 transfer authority](https://uscode.house.gov/us/usc/119-118/t22/s10431/)
- [US Government Publishing Office — Compiled FY2024 NDAA provisions](https://www.govinfo.gov/app/details/COMPS-17632)
- [US Congressional Research Service — AUKUS legal overview and nuclear cooperation](https://www.everycrsreport.com/reports/IF11999.html)

## Sources

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## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/fy2024-ndaa-authorises-virginia-submarine-transfers-december-2023