For the Document: "In 1938, the Foreign Agents Registration Act (22 U.S.C. §§611-621; FARA) was enacted to require individuals doing political or advocacy work on behalf of foreign entities in the United States to register with the Department of Justice and to disclose their relationship, activities, receipts, and disbursements in support of their activities. The FARA does not prohibit any specific activities; rather it seeks to require registration and disclosure of them. According to the most recently available data, more than 400 active FARA registrants represent more than 600 foreign principals."
CRS In Focus, IF10499
Congressional Research Service: https://crsreports.congress.gov/