On June 28, the MSRB sought approval from the SEC for a proposed amendment to Rule G-34 limiting the use by municipal securities dealers of the designation “not reoffered” or “NRO” without also including price or yield information in written communications about new issues of securities. The MSRB has requested that the proposed amendment be made effective 28 days after the date of SEC approval. MSRB Release. MSRB Proposed Amendment.