A "federally related transaction" is a real estate-related financial transaction that involves a federal financial institutions regulatory agency. As defined by Title XI of the Financial Institutions Reform, Recovery, and Enforcement Act of 1989 (FIRREA), this includes transactions where a loan is made, guaranteed, or insured by a federally regulated or insured institution, such as a bank with FDIC insurance. The involvement of such a federal entity triggers the requirement for the appraisal to be performed by a state-licensed or certified appraiser in accordance with federal standards.

A. The appraiser's license is a requirement for conducting an appraisal for a federally related transaction, but the license itself does not define the transaction.

C. This is entirely unrelated to real estate finance or appraisal regulations and is an irrelevant distractor.

D. The origin of investment funds is not the defining characteristic; the key is the involvement of a U.S. federally regulated or insured financial institution.

1. U.S. Code, Title 12, Chapter 34A, § 3350 - Definitions. This section of the U.S. Code, which codifies Title XI of FIRREA, defines a "federally related transaction" as "any real estate-related financial transaction which a federal financial institutions regulatory agency...engages in, contracts for, or regulates; and requires the services of an appraiser."

2. Code of Federal Regulations, 12 C.F.R. § 34.42(f). This regulation by the Office of the Comptroller of the Currency (OCC) defines a "Federally related transaction" as any real estate-related financial transaction that the OCC or one of its regulated institutions engages in or contracts for and requires the services of an appraiser.

3. Glickman, N. J. (Ed.). (2002). The New Urban Agenda: A University of Pennsylvania Journal of the Fels Center of Government. In discussions of housing finance reform, the text references FIRREA's establishment of appraisal standards for all "federally related transactions," linking the term directly to loans from federally insured depository institutions. (University of Pennsylvania Press). Page 112.