On 23 April 2024, Finland's government asked Parliament to update two major laws: the Nuclear Energy Act and the Criminal Code. The reason: Finland joined NATO in April 2023, and now it needs domestic laws that align with how NATO handles nuclear weapons, according to Finland's Ministry of Defence.

Think of it this way: when you join a club with different rules, your personal rulebook has to match. Finland's old laws were written when the country was independent and focused on civilian nuclear power. NATO, however, operates nuclear deterrence — using nuclear weapons as a defensive threat — and requires member countries to have laws that allow allied forces to carry out deterrence work without accidentally breaking the country's own rules.

At the same time, Finland is joining NATO's nuclear decision-making bodies. Defence Minister Häkkänen attended meetings of the Nuclear Planning Group, NATO's main committee for nuclear policy, and Finland participated in Steadfast Noon, NATO's annual nuclear training exercise. These moves show that Finland is not treating nuclear integration as something distant or future — it is happening now, per the Ministry of Defence.

The Nuclear Planning Group is where NATO allies without their own nuclear weapons — including Finland — help decide NATO's nuclear strategy alongside the three countries that do have them: the United States, the United Kingdom, and France. Finland's participation means the country will have a seat at the table, not just follow decisions made elsewhere.

Finland is moving fast. Most NATO countries that joined during the Cold War spent decades gradually learning nuclear rules and practices. Finland is doing the same work in about three years. The April 2024 law change is part of that compressed timeline.

What exactly the new laws will allow, and what information remains secret, is not public — and that is by design. NATO's nuclear arrangements are classified for security reasons. Governments rarely explain which parts of their old laws conflicted with NATO rules. The public sees the legislation move through Parliament; the operational details stay private.

Finland's speed and effort indicate the Defence Ministry sees full integration — legal changes and operational participation — as something to accomplish soon, not eventually. Whether Parliament has approved the April 2024 proposal is not yet confirmed in the public record. But the overall direction is unmistakable.