[bobbruno]

This is a Justice from the brazilian Supreme Court, they are the highest position in the court system, and allowed to make individual rulings and apply sanctions like this.

These decisions hold until ratified or rejected by the court as a whole (which they all eventually will, but it's not fast) or successfully appealed. Appeals can be made only to another Justice or to the court as a whole - no expedited process, because there's no higher authority.

Besides, who'd make the appeal? X has no representation in Brazil (that's why it's been suspended), and there seems to be consensus on that specific point, of legal representation being a requirement by law, so the general attorney or other officials will not question the main decision.

The side decisions are a different matter, that about VPN apps and app stores had been withdrawn. The fine for accessing X is more controversial: hardly enforceable (for just browsing, at least), ongoing hot debate in the country about it being within the Justice's power.

In fact, the Court will probably expedite a whole court judgement on that, and apparently there's no consensus across the Justices on that.