---

Why This Matters Beyond California

California has the largest state bar in the United States. When California formalizes AI ethics requirements in its Rules of Professional Conduct, other state bars follow. Florida and New York have already issued detailed AI guidance. California's amendment package is the most comprehensive yet: six rules, one coordinated framework, all binding conduct requirements once adopted.

The rest of the country is watching.

For law firm owners outside California: this is your preview. Plan accordingly.

---

The Six Rules — In Plain Language

Rule 1.1 — Competence: AI Literacy Is Now Required

Under the proposed amendment, the duty of competence now includes understanding how AI tools work in legal practice. You don't need to be a software engineer. But you do need to understand what the AI tools in your workflow do, what their limitations are, and when to trust their output.

The practical implication: if you're using AI for legal research or drafting without understanding how those tools construct their outputs, you may be practicing outside your competence. "I didn't know the AI could hallucinate" is not a defense.

What to do: Complete at least one structured AI competency training — your state bar's CLE offerings, Clio Academy, or Thomson Reuters' AI training resources — and document it. Make it part of your annual CLE review.

---

Rule 1.4 — Communication: Client Disclosure When AI Materially Affects the Work

The proposed Rule 1.4 amendment requires disclosure to clients when AI "materially affects" the scope, cost, or decision-making in a representation.

If AI reduces a 10-hour research task to 45 minutes, and you charge for 10 hours, that's a disclosure problem. If AI drafts the brief and you review it, that's a material change in how the work gets done — clients have the right to know.

The rule does not require disclosure for every AI tool in your practice. Grammarly, calendar software, and document management systems don't qualify. The trigger is materiality: does the AI change what you're doing, how long it takes, or what you charge?

What to do: Add an AI disclosure clause to your standard engagement letter now. A simple version: "Our firm uses AI-assisted tools for legal research, drafting, and document review. These tools are supervised by licensed attorneys who are responsible for all work product. You will be informed when AI materially affects the scope or cost of your representation."

---

Rule 1.6 — Confidentiality: Client Data Shared With AI Must Be Protected

Proposed Rule 1.6 amendments require lawyers to protect client information shared with AI systems with the same diligence as information shared with any other third party.

The practical question: do you know where the data you send to Claude, ChatGPT, or any AI research tool actually goes? Does your vendor's terms of service allow them to use your client data for training? Have you reviewed your AI vendor's data processing agreements?

If you can't answer those questions, you have a compliance gap under this rule — even before it takes effect.

What to do: Review the privacy policy and data processing terms for every AI tool your firm uses. Use enterprise or API-tier products that commit to not training on your data (Claude for Enterprise, Microsoft 365 Copilot with enterprise data protection, Thomson Reuters CoCounsel). Do not run client-identifying information through consumer-tier AI tools that have no data processing commitments.

---

Rule 3.3 — Candor to Tribunal: Verify Every AI-Generated Citation

This is the one with the most immediate professional risk. Proposed Rule 3.3 amendments require lawyers to independently verify AI-generated legal citations before submitting them in any court filing.

This isn't a new idea — bar associations across the country have been issuing guidance on this for two years. But California is now proposing to make it a binding rule of conduct, not just good practice.

The stakes are real. AI hallucinations in US court filings hit 487 instances in 2025 — more than 10x the count in 2024. Courts are sanctioning lawyers. The California courts are among those paying attention.

What to do: No AI-drafted brief, motion, or pleading leaves your firm without a citation verification step. Run every case cite through Westlaw or Lexis. Verify it exists, says what you claim, and is still good law. This applies to cases cited in passing, not just primary authority. One hallucinated cite in a federal filing has cost lawyers their cases, their clients, and their reputations.

---

Rules 5.1 and 5.3 — Supervision: Governance Policies Are Now Required

Proposed amendments to Rules 5.1 (Responsibilities of Partners, Managers, and Supervisory Lawyers) and 5.3 (Responsibilities Regarding Nonlawyer Assistance) require firm leaders to establish AI governance policies and ensure nonlawyer staff are trained on AI ethics.

For a solo or small firm owner, this means:

1. A written AI use policy. Which tools are approved? For which workflows? What data can and cannot go into them?
2. Documented training. Your paralegal, legal assistant, or law clerk who uses AI tools must be trained on the ethics requirements — disclosure, confidentiality protection, citation verification.
3. Supervisory review. AI-generated work product does not leave the firm without attorney review and sign-off.

This is not bureaucracy. It's the basic governance infrastructure that every firm using AI should already have. The rule formalizes what good practice looks like.

What to do: Write a one-page AI use policy this week. It doesn't need to be 20 pages — it needs to cover: approved tools, prohibited uses (no client data in consumer AI), citation verification requirements, and disclosure obligations. Send it to everyone who uses AI in your office. File it somewhere you can produce it.

---

What the Comment Period Means for Your Firm

The 45-day public comment period closes May 4, 2026. This is when California bar members — including law firm owners — have the opportunity to submit comments on the proposed rules.

If you have concerns about specific provisions (the materiality standard in Rule 1.4, the scope of AI governance requirements in Rules 5.1/5.3), now is the time to say so through the formal process. The California State Bar's public comment archive is at calbar.ca.gov.

Whether or not you comment, start the compliance review now. These rules — or something very close to them — are going to be finalized. The firm that begins updating its engagement letters, governance policies, and training documentation today is not scrambling next year.

---

Your Action List for This Week

1. Read the proposed amendments. Spend 30 minutes with the actual text at calbar.ca.gov. Know exactly what each of the six rules says.
2. Audit your AI tools. List every AI tool in use at your firm, including what your staff uses. For each tool: is your client data protected? Is it covered by a data processing agreement?
3. Update your engagement letter. Add an AI disclosure clause this week. Don't wait for the rules to take effect.
4. Write a one-page AI use policy. Approved tools. Prohibited uses. Citation verification requirement. Distribute to staff.
5. Schedule AI ethics training. For yourself and for any nonlawyer staff using AI. Document it.

May 4 is 32 days away. The firms that treat this as a compliance deadline to prepare for — rather than a future concern to watch — will be positioned correctly when these rules take effect.