Which of the following accounts requires documentation of the person entering an order under MSRB rules?

In the context of MSRB (Municipal Securities Rulemaking Board) regulations, the requirement for documentation of the person entering an order is specifically designed to ensure transparency and accountability in transactions. An individual account necessitates that the identity of the person placing the order be documented to safeguard against fraudulent activities and to comply with regulatory standards. This documentation helps in tracing transactions back to the authorized individual, thereby providing a clear record for both the brokerage firm and regulatory authorities.

Other account types, such as mutual fund accounts, retirement accounts, and trust accounts, may have different requirements regarding documentation primarily due to the structure of these accounts and the roles involved. For example, mutual funds may involve fund managers or advisers entering orders on behalf of multiple investors, which alters the nature of documentation needed. Similarly, retirement accounts often have established plan rules where the account holder may not be the individual making investment decisions, and thus different documentation practices apply. Trust accounts involve the trustee acting on behalf of the trust and the beneficiaries, again changing the dynamics of how orders and documentation are managed.