A guy agrees to be "protector" on his brother's trust in Bermuda. Handshake at a signing dinner. Honorary title. No real work. He checks a box now and then. The trustee does the thinking. The protector nods.

That was the deal. For years.

Then a court in London told him he's been a power-holder this whole time. And the IRS has a form with a box that asks for his name.

Look, the old reading was comfortable. Bermuda's own Court of Appeal called the wider view of a protector's role "at best a recipe for wasteful duplication and at worst an invitation for deadlock." The protector checks the trustee's math. Makes sure nothing breaks the law. Nods. Goes back to his life.

That held for years. A protector with "consent" powers was a speed bump, not a driver. The trustee proposed. The protector rubber-stamped. Simple.

On March 19, 2026, the Privy Council blew that up. Five justices. Unanimous. In a case called X Trusts, they ruled that a protector whose consent is required must exercise independent fiduciary judgment. Not a legality check. Real discretion. The protector can say no to the trustee even when the trustee's decision is rational.

Here's the twist. The Privy Council said this is the default. If your trust deed says "protector consent required" and doesn't spell out that the role is limited to a narrow legality check, silence equals the wider role. The deed doesn't have to grant the power. The court reads it in.

I mean. That's a lot of old trust deeds that just changed meaning without changing a word.

Now here's where it gets interesting for anyone with a US passport.

The IRS has a test for whether a trust counts as domestic or foreign. It lives in Treas. Reg. §301.7701-7. The "control test." It works like this. You count every person who holds power over a "substantial decision" of the trust. Distributions. Investments. Appointing trustees. All of it counts. Fiduciary or not. Doesn't matter.

The regulation gives examples. In Example 3, two US persons can veto a foreign trustee's investment picks but can't make picks on their own. That's not control. Fine.

But in Example 4, the US persons can veto and act on their own judgment. That is control.

See the gap? A veto is one thing. Independent discretion is another. The Privy Council just moved every protector with a consent power from the first box into the second. The protector doesn't just block. The protector exercises independent fiduciary judgment.

That's not a veto. That's a substantial decision.

The IRS already asks about this. Form 3520, Part I, Line 17. It asks for the name of any person with "significant powers" over the trust. It gives an example of who that might be.

Right. It asks for a description of their powers.

The form was always there. The Privy Council just told the IRS what goes in the description box.

Most offshore trusts written before 2026 have generic protector clauses. Boilerplate. "Protector consent required for distributions." No limiting language. No narrow-role carve-out.

Those clauses now read as "wider role" by default. The protector holds independent discretion. If that protector is a US person, the control test gets wobbly.

If the trust flips classification? Penalties start at $10,000. Or 35% of the gross value of what went into the trust. Whichever is bigger. And they stack per year.

Sure.

That guy at the signing dinner thought he was a watchdog. A favor for his brother. The plumbing was always in the wall. Form 3520 always had Line 17. The regulation always counted protectors.

Someone just turned on the water.