http://www.federalreserve.gov/bankinforeg/reglisting.htm#R
R 12 CFR 218
Exceptions for Banks from the Definition of Broker in the Securities Exchange Act of 1934
Defines the scope of securities activities that banks may conduct without registering with the Securities Exchange Commission as a securities broker and implements the most important exceptions from the definition of the term broker for banks under section 3(a)(4) of the Securities Exchange Act of 1934. Specifically, the regulation implements the statutory exceptions that allow a bank, subject to certain conditions, to continue to conduct securities transactions for its customers as part of its trust and fiduciary, custodial, and deposit "sweep" functions and to refer customers to a securities broker-dealer pursuant to a networking arrangement with the broker-dealer