Operating permit.
Operating permit. The document issued pursuant to 26 U.S.C. 5171, that authorizes a person to engage in the business or operation described in the document.
Source
27 CFR § 19.1
Scoping language
As used in this part, the following terms shall have the meanings indicated unless either the context in which they are used requires a different meaning, or a different definition is prescribed for a particular subpart, section, or portion of this part: