Click to see Rules that have recent rulemaking activity or compliance resources:

Expanded Compact
Number Name Status Rule Category Regulated Entity
Rule G-1 Separately Identifiable Department or Division of a Bank
Regulated Entity Administration Dealers, Municipal Advisors, Bank Dealers
Rule G-23 Activities of Financial Advisors
Fair Practice Dealers, Municipal Advisors, Bank Dealers
Rule G-27 Supervision
Regulated Entity Administration Dealers, Bank Dealers, Municipal Fund Securities
Rule G-37 Political Contributions and Prohibitions on Municipal Securities Business and Municipal Advisory Business
Fair Practice Dealers, Municipal Advisors, Bank Dealers, Municipal Fund Securities
Rule G-47 Time of Trade Disclosure
Fair Practice Dealers, Bank Dealers, Municipal Fund Securities
Rule G-1
Last Updated: 02/26/2015
Separately Identifiable Department or Division of a Bank

Rule Summary: Defines the term “separately identifiable department or division of a bank” and sets forth bank activities that constitute dealer activities.

Rule for:

Dealers, Municipal Advisors, Bank Dealers

Status:
Request for Comment (04/23/2026)
Request for Comment on Draft Amendments to MSRB Rules to Retire Financial Advisor Terminology Pursuant to the MSRB’s Municipal Advisor Retrospective Rule Review (as revised on May 6, 2026)
View Notice
Notice (05/06/2026)
Correction to MSRB Notice 2026-03 Requesting Comments on Draft Amendments to MSRB Rules to Retire Financial Advisor Terminology Pursuant to the MSRB’s Municipal Advisor Retrospective Rule Review
View Notice
Rule G-23
Last Updated: 05/27/2011
Activities of Financial Advisors

Rule Summary: Requires dealers to evidence in writing financial advisory relationships and prohibits dealers from serving as financial advisor and underwriter or placement agent on the same issue.

Rule for:

Dealers, Municipal Advisors, Bank Dealers

Status:
Request for Comment (04/23/2026)
Request for Comment on Draft Amendments to MSRB Rules to Retire Financial Advisor Terminology Pursuant to the MSRB’s Municipal Advisor Retrospective Rule Review (as revised on May 6, 2026)
View Notice
Notice (05/06/2026)
Correction to MSRB Notice 2026-03 Requesting Comments on Draft Amendments to MSRB Rules to Retire Financial Advisor Terminology Pursuant to the MSRB’s Municipal Advisor Retrospective Rule Review
View Notice
Rule G-27
Last Updated: 07/01/2024
Supervision

Rule Summary: Outlines requirements for a dealer’s supervision of personnel engaged in activities involving municipal securities activities.

Rule for:

Dealers, Bank Dealers, Municipal Fund Securities

Status:
Request for Comment (01/14/2026)
Request for Comment on MSRB Rule G-27 on Dealer Supervision
View Notice
Rule G-37
Last Updated: 08/04/2016
Political Contributions and Prohibitions on Municipal Securities Business and Municipal Advisory Business

Rule Summary: Prohibits dealers from engaging in municipal securities business and municipal advisors from engaging in municipal advisory business with municipal entities if certain contributions have been made to officials of such municipal entities within the preceding two-year period, and requires dealers and municipal advisors to disclose certain political contributions and other information.

Rule for:

Dealers, Municipal Advisors, Bank Dealers, Municipal Fund Securities

Status:
Request for Comment (04/23/2026)
Request for Comment on Draft Amendments to MSRB Rules to Retire Financial Advisor Terminology Pursuant to the MSRB’s Municipal Advisor Retrospective Rule Review (as revised on May 6, 2026)
View Notice
Notice (05/06/2026)
Correction to MSRB Notice 2026-03 Requesting Comments on Draft Amendments to MSRB Rules to Retire Financial Advisor Terminology Pursuant to the MSRB’s Municipal Advisor Retrospective Rule Review
View Notice
Rule G-47
Last Updated: 03/03/2025
Time of Trade Disclosure

Rule Summary: Requires dealers to disclose to customers at or prior to the time of trade all material information known or available publicly through established industry sources.

Rule for:

Dealers, Bank Dealers, Municipal Fund Securities

Status:
Request for Comment (12/11/2024)
Concept Release: MSRB Requests Comment on Potential Modernization of Municipal Fund Securities Disclosure Obligations
View Notice
Guidance (03/03/2025)
Time of Trade Disclosures in Inter-Dealer Transactions
View Guidance
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