Explanation:

- Ultra Vires: A Latin term meaning "beyond the powers." This term usually refers to acts conducted beyond one's legal authority.

- Caveat Emptor: Latin for "let the buyer beware." It denotes that the buyer is responsible for checking the quality and suitability of goods before a purchase is made.

- Stare Decisis: This phrase means "to stand by things decided." It’s the legal principle of determining points in litigation according to precedent.

- Uberrimae Fidei: Latin for "utmost good faith," and it’s essential in insurance contracts, requiring both parties to act honestly and not withhold information.

Correct Answer: Uberrimae Fidei