Opinion of the Court
tropic Substances, a treaty signed by the United States and implemented by the Act. Feb. 21, 1971, [1979–1980], 32 U. S. T. 543, T. I. A. S. No. 9725. See 282 F. Supp. 2d, at 1252–1253.
The District Court heard evidence from both parties on the health risks of hoasca and the potential for diversion from the church. The Government presented evidence to the effect that use of hoasca, or DMT more generally, can cause psychotic reactions, cardiac irregularities, and adverse drug interactions. The UDV countered by citing studies documenting the safety of its sacramental use of hoasca and presenting evidence that minimized the likelihood of the health risks raised by the Government. With respect to diversion, the Government pointed to a general rise in the illicit use of hallucinogens, and cited interest in the illegal use of DMT and hoasca in particular; the UDV emphasized the thinness of any market for hoasca, the relatively small amounts of the substance imported by the church, and the absence of any diversion problem in the past.
The District Court concluded that the evidence on health risks was "in equipoise," and similarly that the evidence on diversion was "virtually balanced." Id., at 1262, 1266. In the face of such an even showing, the court reasoned that the Government had failed to demonstrate a compelling interest justifying what it acknowledged was a substantial burden on the UDV's sincere religious exercise. Id., at 1255. The court also rejected the asserted interest in complying with the 1971 Convention on Psychotropic Substances, holding that the Convention does not apply to hoasca. Id., at 1266–1269.
The court entered a preliminary injunction prohibiting the Government from enforcing the Controlled Substances Act with respect to the UDV's importation and use of hoasca. The injunction requires the church to import the tea pursuant to federal permits, to restrict control over the
