The following excerpt is from U.S. v. Chen, 2 F.3d 330 (9th Cir. 1993):
It is apparent from the face of section 1103(a) and (b) that if the Attorney General deemed it necessary, she could, by herself, undertake an undercover investigation of the type involved here, as long as her actions did not directly contravene any constitutional provision. See United States v. Davis, 905 F.2d 245, 248 (9th Cir.1990) (extraterritorial application of statute must "not violate the due process clause of the fifth amendment"), cert. denied, 498 U.S. 1047, 111 S.Ct. 753, 112 L.Ed.2d 773 (1991). It follows, again from the face of the statute, that she could, in her discretion, delegate the authority to conduct such an operation, or even the discretion to decide whether such an operation is necessary, to the Commissioner.
The Attorney General has done exactly that:
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