practice
The term practice means any informal or formal appearance before, or, with the intent to influence, any oral or written communication to the Department or, where applicable, to a separate statutory agency thereof on a pending matter of business on behalf of any other person (except the United States).
Source
31 CFR § 15.737-2
Scoping language
For the purpose of this part - The term Department means the Department of the Treasury and includes the separate statutory agencies thereof.