The MSRB filed a rule change with the SEC to extend the effective date of previously approved amendments to MSRB Rule G-21 and new MSRB Rule G-40 (collectively, the "advertising rules"). Currently, the effective date of the advertising rules is set to be February 7, 2019.

The MSRB stated that it is seeking the extension in order to complete its initial guidance, submit any related rule changes, "and, subsequently, allow dealers and municipal advisors to establish and implement effective policies and procedures for compliance with the advertising rules."

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