In brief On 20 June 2024, the US Supreme Court ruled, in a 7-to-2 decision in favor of the government, to uphold the constitutionality of the section 965 transition tax in Moore v. United States. This case has been closely watched because it informs a potential future dispute concerning the legality of a wealth tax and significant longstanding portions of the US tax regime. The original question presented was whether, under the Sixteenth Amendment, income must…