Putting It Together: Rule Comparison at a Glance
Quick Answer
A Series 6 firm selling mutual funds, variable contracts, and 529 plans operates under three complementary supervisory rules. FINRA Rule 3110 builds the supervisory system. FINRA Rule 3120 tests whether the system works via an annual report to senior management. MSRB Rule G-27 is the municipal parallel, requiring a Series 51 or Series 53 principal for municipal fund securities.
A Series 6 firm selling mutual funds, variable contracts, and 529 plans operates under three supervisory rules simultaneously. This closing section pulls them together so the Function 2.4 scope lines up cleanly in your memory.
The core insight: these three rules are complementary, not alternative. A firm must satisfy all three.
What three supervisory rules govern a Series 6 firm?
| Rule | What It Requires | Who It Applies To |
|---|---|---|
| FINRA Rule 3110 | Supervisory system and written supervisory procedures (WSPs); designated principals; on-site Office of Supervisory Jurisdiction (OSJ) principal; review of correspondence, internal communications, and transactions; branch office inspection cycle (annual for OSJ / supervising branches, every three years for non-supervising branches and non-branch locations) | All FINRA member firms; applies to the firm's investment banking and securities business generally |
| FINRA Rule 3120 | Supervisory control system that tests and verifies 3110 procedures; designated principal(s); annual report to senior management summarizing test results, exceptions, and amended procedures; risk-based testing and sampling permitted | All FINRA member firms; sits on top of Rule 3110 |
| MSRB Rule G-27 | Municipal-securities supervisory system and WSPs; designated municipal principal (Series 53) with overall responsibility; Series 51 or 53 qualified supervisors for municipal fund securities; parallel correspondence, transaction, and inspection requirements | Broker-dealers, municipal securities dealers, and bank dealers engaged in municipal securities activities; for Series 6, focused on 529 plans, Local Government Investment Pools (LGIPs), and Achieving a Better Life Experience (ABLE) accounts |
Memory Aid:
- 3110 = SYSTEM (build the supervisory machine)
- 3120 = SUPERVISE the SYSTEM (test whether the machine works)
- G-27 = MUNICIPAL parallel (same machine, municipal activities, Series 51 / 53 principals)
Exam Tip: Gotchas
- Non-supervising branches and non-branch locations are BOTH on the every-three-year cycle under Rule 3110(c). The common mix-up is assuming all branches are annual. Only OSJs and supervising branches get the annual cycle.
How do FINRA Rules 3110, 3120, and MSRB G-27 work together?
A Series 6 firm that sells 529 plans through a Series 6 rep must satisfy all three rules:
- FINRA Rule 3110: general supervision of the rep, the firm's business, WSPs, branch inspections, correspondence and transaction review by a registered principal
- FINRA Rule 3120: testing of that supervision, annual report to senior management, documentation of exceptions and remedial procedures
- MSRB Rule G-27: municipal-specific supervision of the 529 plan activity, with a Series 51 or Series 53 principal covering the municipal fund securities piece
In the firm's WSPs, these three regimes are typically integrated. The Series 26 principal supervises mutual fund and variable contract activities; the Series 51 or Series 53 principal covers the 529 plan activities; the designated Rule 3120 principal tests both supervisory programs and rolls the results into the annual report to senior management.
Think of it this way: Three rules, one firm. The Series 26 principal approves the mutual fund account; the Series 51 or Series 53 principal approves the 529 account; the Rule 3120 principal audits both approvals once a year and reports the findings to senior management. Every account, every approval, every test, every report feeds into the same integrated supervisory record.
Exam Tip: Gotchas
- The three rules are complementary, not alternative. A firm selling 529 plans through a Series 6 rep must satisfy FINRA Rule 3110 (general supervision), FINRA Rule 3120 (testing of that supervision), and MSRB Rule G-27 (municipal-specific supervision) simultaneously. Satisfying one does not substitute for satisfying another.
- The Series 26 principal is NOT qualified to supervise the 529 plan side of the business. A firm that mixes investment-company business with municipal fund securities needs BOTH a Series 26 principal (for the mutual funds and variable contracts) AND a Series 51 or Series 53 principal (for the 529 plans, LGIPs, and ABLE accounts).
What are the key distinctions Function 2.4 questions test?
When you see a Function 2.4 question, the answer almost always turns on one of these five distinctions:
- Principal vs. supervisor: only a registered principal signs statutorily required written approvals
- Annual vs. every-three-year inspection: OSJ and supervising branches are annual; non-supervising branches and non-branch locations are every three years (presumed)
- Subscription-way check handling: payable to the issuer, never to the BD or rep; "promptly transmit" means no later than noon of the next business day
- Rule 3110 vs. Rule 3120: 3110 builds the system; 3120 tests and reports on the system
- FINRA vs. MSRB: non-municipal activities fall under 3110/3120; municipal fund securities (529, LGIP, ABLE) fall under G-27 with Series 51 or Series 53 principal qualification
Every written approval Function 2.4 tests traces back to one of those distinctions.
What are the most tested supervisory rule-comparison distinctions?
Exam Tip: Gotchas
- Rule 3110 + Rule 3120 + MSRB G-27 are simultaneous requirements for a full-service Series 6 firm. They are not a menu; they are a stack.
- Supervising a 529 plan sale requires a Series 51 or Series 53 principal, not a Series 26 principal. Wrong principal qualification = G-27 violation.
- The Rule 3120 annual report must reach SENIOR MANAGEMENT. Testing without reporting up does not complete the control cycle.
- OSJ and supervising branch inspections are annual (calendar-year cycle); non-supervising branches and non-branch locations are every three years (regular periodic schedule presumed at three years).
- Every supervisory approval in this unit ultimately traces back to Rule 4512's requirement that a registered principal signs the new-account record. That signature is the embodiment of the firm's 3110 supervisory system at the account level.