California RDA Exam Area 4: Laws and Regulations

Area 4 of the California RDA Combined Written and Law and Ethics Examination covers Laws and Regulations. While it accounts for only 10% of the test—roughly 10 scored questions—it is the most rigid content you will face.¹ Most answers are settled by a statute, a regulation, or a court decision, meaning you must rely on the exact legal text rather than clinical intuition or office habits.

At a glance

What the exam expects you to know

T46 — Patient consent and informed treatment decisions

California's informed consent rule is built on the Cobbs v. Grant decision, which requires the provider to disclose the available choices and potential dangers of proposed therapy.⁶ The standard is what a reasonable patient needs to know to make an intelligent choice, not merely what other providers customarily say. The disclosure conversation belongs exclusively to the treating dentist, because diagnosis and treatment planning are never delegable to any dental assistant.⁷

Your role as an RDA is supportive and procedural. You verify that consent is documented in the chart before assisting, relay patient questions or hesitation to the dentist, and stop immediately if a patient withdraws consent mid-procedure. You may not substitute your own explanation for the dentist's diagnosis-and-risks conversation.

T47 — HIPAA, CMIA, and patient privacy

Privacy in a California dental office operates on two layers. The federal Health Insurance Portability and Accountability Act (HIPAA) acts as a floor, permitting the sharing of protected health information without authorization for treatment, payment, and health care operations.⁸ The minimum necessary standard applies to payment and operations, but it does not apply to disclosures to a health care provider for treatment purposes.⁸

California's Confidentiality of Medical Information Act (CMIA) sits on top as a stricter ceiling. It commands that a provider shall not disclose medical information without authorization, outside of specific statutory exceptions.⁹ When the two conflict, the stricter California rule controls. In practice, this means no overheard patient talk, no shared logins, no screens facing the waiting room, and routing every records request through the office's lawful release process.

T48 — Mandated reporting for abuse, neglect, and exploitation

You are a mandated reporter for child abuse, but not because your job title is named in the law. Penal Code §11165.7(a)(21) covers anyone "currently licensed under Division 2" of the Business and Professions Code, which includes an RDA; an unlicensed assistant is not covered merely by job title.¹⁰ If you have reasonable suspicion of child abuse or neglect, you must report it to the designated law-enforcement or county child-welfare agency by telephone immediately or as soon as practicably possible, followed by a written report within 36 hours.¹⁰ A team designation is only lawful by mutual agreement under §11166(h), and if the designee fails to report, your duty revives.¹⁰ Merely telling your supervising dentist does not discharge your duty.

For elders and dependent adults, Welfare & Institutions Code §15630 requires you to report known or suspected physical abuse, abandonment, abduction, isolation, financial abuse, or neglect.¹¹ Report immediately or as soon as practicably possible by telephone or through the confidential internet reporting tool, with a written or internet report within two working days.¹¹

T49 — Record-keeping, storage, and disposal

The dental record is a legal document. Standard records practice is to make accurate entries at the time of care and to correct them with a dated addendum that leaves the original text readable.¹² Altering a patient's record with intent to deceive is unprofessional conduct and heavily penalized.¹³

Patients have enforceable access rights under Health & Safety Code §123110: they may inspect their records within 5 working days and receive requested copies within 15 days for a cost-based fee.¹⁴ For radiographs, the office may alternatively transmit the originals within 15 days to a provider the patient names.¹⁴ You may never withhold records over an unpaid balance. When disposing of records, destroy them so no one can read them: the CMIA bars disclosing medical information without authorization outside its listed exceptions.⁹

T50 — Professional conduct and integrity

Business & Professions Code §1680 defines unprofessional conduct for all licensees, which includes aiding or abetting the unlicensed practice of dentistry.¹³ This means an RDA who performs duties beyond their legal scope, and the dentist who permits or pressures it, both face discipline. Recent amendments under SB 1453 made it a misdemeanor to fail to display the licenses of all dental practitioners in the facility.^{15 16} Furthermore, BPC §123 treats subverting a licensing examination as misconduct, including obtaining, reproducing, reconstructing, or possessing any portion of a current or previously administered exam without authorization.¹⁷

T51 — Scope of practice and supervision levels

Scope questions require you to match the auxiliary category, the duty, and the supervision level against the Dental Practice Act and the Board's Table of Permitted Duties effective January 1, 2025.⁵ General supervision means the procedure is based on the dentist's instructions without requiring their physical presence, while direct supervision requires the dentist to be physically present in the treatment facility during the procedure.⁴ The Board's duties table adds that procedures performed under direct supervision are checked and approved by the supervising dentist before the patient is dismissed.⁵

Under BPC §1752.4, an RDA's native duties in subdivisions (a)(2) through (a)(18)—such as mouth-mirror inspection, pulp vitality testing, placing bases and liners, and coronal polishing—start at general supervision, subject to the supervising dentist's determination under subdivision (d).¹⁸

However, for duties an RDA inherits from the unlicensed assistant list through subdivision (a)(1), the authorities conflict. Section 1752.4(a) and the Board's table point to general supervision, while BPC §1750.1(b) and 16 CCR §§1085–1086 keep several of those same duties at direct supervision.^{7 18 19 5} In January 2026, a Board working group proposed keeping matrix placement, wedging, and removal, post-extraction-dressing removal, periodontal-dressing removal, and suture removal at direct supervision for both DAs and RDAs.²⁰ This is a legislative proposal, not current law, so you must recognize the conflict rather than assuming a bright line.

Do not flatten BPC §1752.4 into "three ways" to direct supervision; the statute has six subdivisions. The dentist may raise a general duty to direct under (d), course-gated duties are listed in (b), with the dentist responsible under (c) for ensuring course completion, orthodontic duties in (e) are direct by statute, and contemporary techniques in (f) have their own direct lane.¹⁸

Common traps

• The fixed passing percentage myth → The exam is pass/fail and criterion-referenced under 16 CCR §1081 using the modified Angoff method. The Board publishes no fixed passing percentage or numeric score, so do not budget how many questions you "need" to pass.³
• Assuming general supervision means no dentist involvement → General supervision waives the requirement of physical presence, but the procedure must still be based on the dentist's instructions, and the dentist retains full professional responsibility.⁴
• Believing dental assistants are named in the child abuse statute → Penal Code §11165.7(a)(21) names dentists and hygienists, but an RDA is only covered through the catchall for persons licensed under Division 2 of the Business and Professions Code. An unlicensed assistant is not a mandated reporter by job title.¹⁰
• Withholding records for an unpaid balance → California has no "hostage rule." The 5-working-day inspection and 15-day copy clocks run regardless of any billing dispute.¹⁴
• Studying from pre-2025 duties charts → SB 1453 and the Board's Table of Permitted Duties effective January 1, 2025 restructured several rules, and SB 1311 changed the unlicensed assistant's infection-control prerequisite again on September 14, 2026. Older charts and study guides can feed you outdated rules.^{5 16 21}

Check yourself

Answer the original practice item, then take the free 15-question practice test to see every area.

How to study this area

Area 4 carries a 10% weight, representing roughly 10 of your 100 scored items, and its rules are specific and learnable from the exact legal texts. Because the exam is administered by PSI and features 125 total items (100 scored and 25 unscored pretest) over 3 hours, rigid legal facts deserve deliberate study.² Allocate your study time to memorize the specific clocks, reporting agencies, and supervision definitions rather than relying on what feels correct in a clinical setting.

When studying, focus on the contrasts that the exam uses as distractors. Keep the reporting timelines physically separate in your memory, and always run a three-part check (category, duty, supervision level) on any scope scenario.

1. Memorize the clocks: 36 hours for child abuse written reports versus two working days for elder abuse; 5 working days for record inspection versus 15 days for copies.
2. Anchor on the 2025 table: Use the Board's Table of Permitted Duties effective January 1, 2025 as your primary reference for scope questions, noting the conflict for inherited duties.
3. Layer the privacy rules: Always check a privacy scenario against both the HIPAA floor and the stricter CMIA ceiling.

Questions candidates ask

Do I need an RDA license to take X-rays?

No. Under California law, operating dental radiographic equipment requires the completion of a Board-approved radiation safety course, not an RDA license.²² An unlicensed dental assistant who has completed the required course and displays the certificate may expose radiographs.^{23 22}

Is the RDA practical exam still required?

No. The RDA practical examination was eliminated. Licensure now requires written evidence of eligibility and passing the single Combined Written and Law and Ethics Examination.²⁴

Can an RDA remove sutures without the dentist present?

This is an unsettled area of inherited duties. Suture removal is an unlicensed assistant duty under BPC §1750.1(b) requiring direct supervision and the dentist's prior inspection of the site.⁷ While RDAs inherit this duty, authorities conflict on the supervision level, and a January 2026 Board working group proposed keeping it at direct supervision for both categories, though this proposal is not current law.^{18 20}

Footnotes

1. Dental Board of California — RDA Combined Written and Law and Ethics Examination Outline (2023). Dental Board of California ↩ ↩² ↩³ ↩⁴

2. PSI Services — Candidate Information Bulletin and test-taker portal. PSI Services ↩ ↩²

3. 16 CCR §1081 — RDA Combined Written and Law and Ethics Examination pass/fail standard. 16 CCR §1081 ↩ ↩²

4. California Business & Professions Code §§1740–1742 — direct and general supervision definitions. California Business & Professions Code §1741 ↩ ↩² ↩³

5. Dental Board of California — Table of Dental Auxiliary Duties Delegable by Supervising Dentist. Dental Board of California ↩ ↩² ↩³ ↩⁴ ↩⁵

6. Cobbs v. Grant (1972) 8 Cal.3d 229 — informed consent doctrine in California. Cobbs v. Grant (1972) 8 Cal.3d 229 ↩

7. California Business & Professions Code §1750.1 — basic supportive dental procedures and never-delegable exclusions. California Business & Professions Code §1750.1 ↩ ↩² ↩³

8. 45 CFR Parts 160 and 164 — HIPAA Privacy and Security Rules and the minimum necessary standard. 45 CFR Parts 160 and 164 ↩ ↩²

9. California Civil Code §56.10 — Confidentiality of Medical Information Act. California Civil Code §56.10 ↩ ↩²

10. California Penal Code §§11165.7, 11166 — mandated child-abuse reporting. California Penal Code §§11165.7, 11166 ↩ ↩² ↩³ ↩⁴

11. California Welfare & Institutions Code §15630 — mandated elder and dependent adult abuse reporting. California Welfare & Institutions Code §15630 ↩ ↩²

12. Bird DL, Robinson DS. Modern Dental Assisting. Current edition, Elsevier — standard dental-assisting reference. ↩

13. California Business & Professions Code §1680 — unprofessional conduct grounds. California Business & Professions Code §1680 ↩ ↩²

14. California Health & Safety Code §123110 — patient access to records. California Health & Safety Code §123110 ↩ ↩² ↩³

15. California Business & Professions Code §1700 — license display requirement. California Business & Professions Code §1700 ↩

16. SB 1453 (Ashby), Chapter 483, Statutes of 2024 — license-display misdemeanor and pathway changes. California Legislative Information, SB 1453 bill page ↩ ↩²

17. California Business & Professions Code §123 — subversion of a licensing examination. California Business & Professions Code §123 ↩

18. California Business & Professions Code §1752.4 — RDA duties and supervision levels. California Business & Professions Code §1752.4 ↩ ↩² ↩³ ↩⁴

19. 16 CCR §§1085–1087 — Dental assisting duty regulations implementing the permitted-duties framework. 16 CCR §§1085–1087 ↩

20. Dental Board of California — Dental Board of California, February 5–6, 2026 meeting materials, Agenda Item 25.b. Dental Board of California ↩ ↩²

21. California Legislative Information, SB 1311 bill text — SB 1311, Chapter 232, Statutes of 2026. California Legislative Information, SB 1311 bill text ↩

22. California Business & Professions Code §1656 — dental radiography authorization. California Business & Professions Code §1656 ↩ ↩²

23. California Business & Professions Code §1750 — unlicensed dental assistant definition and employer duties. California Business & Professions Code §1750 ↩

24. California Business & Professions Code §1752.1 — RDA licensure eligibility pathways. California Business & Professions Code §1752.1 ↩