Opinion of the Court
have been surprising to find that this was such a case, given the longstanding exemption from the Controlled Substances Act for religious use of peyote, and the fact that the very reason Congress enacted RFRA was to respond to a decision denying a claimed right to sacramental use of a controlled substance. See 42 U. S. C. §2000bb(a)(4). And in fact the Government has not offered evidence demonstrating that granting the UDV an exemption would cause the kind of administrative harm recognized as a compelling interest in Lee, Hernandez, and Braunfeld. The Government failed to convince the District Court at the preliminary injunction hearing that health or diversion concerns provide a compelling interest in banning the UDV’s sacramental use of hoasca. It cannot compensate for that failure now with the bold argument that there can be no RFRA exceptions at all to the Controlled Substances Act. See Tr. of Oral Arg. 17 (Deputy Solicitor General statement that exception could not be made even for "rigorously policed" use of "one drop" of substance "once a year").
IV
Before the District Court, the Government also asserted an interest in compliance with the 1971 United Nations Convention on Psychotropic Substances, Feb. 21, 1971, [1979–1980], 32 U. S. T. 543, T. I. A. S. No. 9725. The Convention, signed by the United States and implemented by the Controlled Substances Act, calls on signatories to prohibit the use of hallucinogens, including DMT. The Government argues that it has a compelling interest in meeting its international obligations by complying with the Convention.
The District Court rejected this interest because it found that the Convention does not cover hoasca. The court relied on the official commentary to the Convention, which notes that "Schedule I [of the Convention] does not list . . .
