9.33 Controlled Substance-Manufacture for Purpose of Importation is the manufacturing of a controlled substance with the intent to import it into the United States. The controlled substance must be for legitimate medical, scientific, or industrial purposes, and must be approved by the Drug Enforcement Administration. There are two types of 9.33 Controlled Substance-Manufacture for Purpose of Importation: 9.33(a) and 9.33(b). 9.33(a) involves the manufacture of a controlled substance for the purpose of importation into the US, while 9.33(b) involves the manufacturing of a controlled substance with the intent to export it from the US. Both 9.33(a) and 9.33(b) require the submission of an import/export application to the DEA for approval before any manufacturing or exporting can occur.