A grandmother saving for college, a 38-year-old saving for a wheelchair-accessible van and a county treasurer parking tax receipts for six weeks all buy the same kind of security. None of them buys a bond or a registered mutual fund.
Start with the problem that the Municipal Securities Rulemaking Board (MSRB) definition solves. A pool that invests many people's money in securities normally must register with the Securities and Exchange Commission (SEC) as an investment company under the Investment Company Act of 1940. Section 2(b) of that Act carves out governments. The Act does not apply to the United States, a state, a political subdivision of a state, or their agencies and instrumentalities.
So when a state builds a pooled fund, the 1940 Act steps aside. The MSRB, which writes the rules for municipal securities dealers, fills the gap. MSRB Rule D-12 defines a municipal fund security as a municipal security issued by an issuer that would be an investment company if not for the Section 2(b) government exclusion.
Common mistakes
- Using the pre-2026 ABLE age: Onset before 26 was the rule only through 2025. For 2026 the test is onset before 46, so onset at 30 now qualifies.
- Matching the ABLE limit to the gift exclusion: The two figures split in 2026. The ABLE base limit is $20,000, the gift exclusion is $19,000, and superfunding covers $95,000.
- Allowing one investment change a year: Both 529 and ABLE programs allow 2 changes per calendar year.
Bottom line
- A municipal fund security is a government-issued pool that would be an investment company but for the Section 2(b) exclusion (MSRB Rule D-12): 529 savings plans, ABLE programs and LGIPs.
- Prepaid tuition plans lock in tuition at today's prices; college savings plans are invested accounts with market risk and no guarantee; both take cash only and allow 2 investment changes a year.
- The 529 account owner controls investments, withdrawals and beneficiary changes; in an ABLE account the beneficiary is the owner.
- Qualified 529 withdrawals are tax-free; non-qualified earnings are taxed to the distributee plus a 10% additional tax, waived for death, disability, a scholarship or military academy attendance.
Exam shortcut
Check the year and the account type first. For 2026, remember "46, twenty, twenty": ABLE onset before 46, a $20,000 ABLE base limit and a $20,000 K-12 cap. Answers showing 26, $10,000, or $19,000 as the ABLE limit are the old-rule traps. On "who" questions, sort the roles first: The 529 owner controls the account. The 529 beneficiary benefits from it. The ABLE beneficiary does both.
The full lesson (about 4,659 words, 31 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
- B9
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