Which act requires financial institutions to inform customers of their privacy policies?

The Gramm-Leach Bliley Act is the correct answer because it specifically mandates that financial institutions disclose their privacy policies to customers. This legislation was enacted in 1999 to ensure that consumers are informed about how their personal financial information is collected, used, and shared. Under this act, financial institutions are required to provide a notice to customers explaining their privacy practices and policies, allowing individuals to understand their rights concerning their personal information.

The other acts mentioned focus on different aspects of financial regulation and compliance, such as the creation of anti-money laundering (AML) frameworks or the requirements for financial institutions to deter illicit activities. However, they do not specifically set forth requirements regarding customer privacy policies in the same comprehensive manner as the Gramm-Leach Bliley Act.