Final answer:
Federally related transaction appraisals for properties valued above $250,000 require a licensed or certified appraiser as mandated by the Title XI of the Financial Institutions Reform, Recovery, and Enforcement Act of 1989.
Step-by-step explanation:
According to federal regulations, a licensed or certified appraiser is required for all federally related transaction appraisals for properties valued above $250,000. This requirement comes from the Title XI of the Financial Institutions Reform, Recovery, and Enforcement Act of 1989 (FIRREA), which mandates the use of a certified appraiser for residential real property transactions involving a federally related loan. Thus, financial institutions must secure the services of a licensed professional when dealing with transactions above that threshold to ensure a valid and reliable valuation of the property in question.