The Municipal Securities Rulemaking Board (MSRB) today filed, for immediate effectiveness, an amendment to MSRB Rule A-4, Meetings of the Board, to add that to constitute a quorum of the Board, at least one member of the Board who is a municipal advisor representative must be present. Under Rule A-4 as amended, a quorum of the Board consists of two-thirds of the whole Board, and at least one public representative, one broker-dealer representative, one bank representative and one municipal advisor representative must be present.