Final answer:
Firms that transact business in municipal securities are required to notify customers of certain information under MSRB rules.
Step-by-step explanation:
Firms that transact business in municipal securities are required to notify customers of all of the following under MSRB rules:
- The names of all MSRB member firms
- The MSRB website address
- The availability of an investor brochure
They are NOT required to notify customers that the firm is registered with the SEC and the MSRB.
These rules are in place to ensure transparency and provide important information to customers regarding the municipal securities market.