40 C.F.R. § 707.63
The definitions set forth in the Toxic Substances Control Act, section 3, apply for this part. In addition, the following abbreviations and definitions are provided for purposes of this rule:
CDX or Central Data Exchange means EPA's centralized electronic document receiving system, or its successor system.
EPA means the Environmental Protection Agency.
Exporter means the person who, as the principal party in interest in the export transaction, has the power and responsibility for determining and controlling the sending of the chemical substance or mixture to a destination out of the customs territory of the United States.
Regulated chemical means any chemical substance or mixture for which export notice is required under § 707.60 .
TSCA means the Toxic Substances Control Act.
40 C.F.R. §707.63