31 CFR 1010.912: Persons who may issue summons.

For purposes of this chapter, the following officials are hereby designated as delegates of the Secretary who are authorized to issue a summons under § 1010.911, solely for the purposes of civil enforcement of this chapter:

(a) FinCEN. The Director, FinCEN.

(b) Internal Revenue Service. Except with respect to § 1010.340 of this chapter, the Commissioner, the Deputy Commissioner, or a delegate of either official, and, for the purposes of perfecting seizures and forfeitures related to civil enforcement of this chapter, the Chief (Criminal Investigation) or a delegate.

(c) Customs and Border Protection. With respect to § 1010.340 of this chapter, the Commissioner, the Deputy Commissioner, the Assistant Commissioner (Enforcement), Regional Commissioners, Assistant Regional Commissioners (Enforcement), and Special Agents in Charge.