Shared password culture
Rules of behavior explicitly ban credential sharing; repeated violations feed sanctions — supporting AC-2/IA-2 enforcement culturally.
Rules of Behavior
Medium Risk
Easy
Low Cost
PL-4 requires establishing and providing to individuals requiring access a set of rules describing responsibilities and expected behavior for information and system usage, receiving documented acknowledgment before authorizing access, updating rules frequently, and including social media and related restrictions where defined. Rules of behavior make acceptable use enforceable for people who touch ePHI.
Control Objective
Give every user clear, acknowledged rules for how they may use systems and data — including ePHI — before access is granted and whenever rules materially change.
Implementation Guidance
- Publish rules covering: unique credentials, no sharing logins, device/encryption expectations, ePHI handling, email/USB restrictions, remote access, incident reporting, and sanctions references.
- Require acknowledgment at hire before system access and annually or on major updates.
- Host acknowledgments in LMS/HRIS with timestamps.
- Include social media / public posting restrictions relevant to patient privacy (ties to AC-22).
- Provide a short version staff actually read; link full policy.
- Update after major threats or system changes; re-acknowledge when material.
- Align language with HIPAA sanctions and privacy policies.
- Cover contractors and students with equivalent acknowledgments.
Real-World Use Cases
How this control shows up in healthcare and HIPAA-covered environments.
Social media patient story
Staff post identifiable patient info. PL-4 rules + AC-22 processes support investigation and corrective action.
Annual re-ack after telehealth expansion
Updated rules add home-office ePHI expectations; LMS forces re-acknowledgment before continued remote EHR use.
Best Practices
- Acknowledge before access.
- Plain-language rules with examples.
- Track completion centrally.
- Re-ack on material updates.
- Include privacy-relevant social posting rules.
- Same expectations for contractors.
Common Gaps & Violations
- AUP exists but never acknowledged.
- Acknowledgment only at hire, never updated.
- Rules silent on ePHI and remote work.
- Contractors not covered.
- No link to sanctions process.
Required Documentation
- Rules of behavior / acceptable use document
- Acknowledgment records (hire + periodic)
- Version history of rules
- Contractor acknowledgment process
- Reference to sanctions policy
How to Test & Validate
- Sample new hires for acknowledgment before access.
- Verify annual/periodic completion rates.
- Confirm contractors are included.
- Review rules for ePHI and remote access topics.
- Check re-ack after last material update.
Audit Considerations
Assessors sample acknowledgment records. Missing or outdated AUP acknowledgments weaken workforce security narratives.
HIPAA Mapping
How this NIST control supports HIPAA Security Rule expectations.
- 164.308(a)(5) Security Awareness and Training — rules reinforce expected behavior taught in training.
- 164.530(e) Sanctions — apply appropriate sanctions against workforce who fail to comply with policies.
- 164.316 Policies and procedures — implement and document reasonable policies; rules of behavior operationalize them for users.
- 164.530(c) Safeguards — workforce safeguards include expected handling behaviors.
Compliance Tips
- Gate IdP activation on PL-4 acknowledgment.
- Keep the acknowledgment form to one screen with the critical 'never' list.
- Reissue after major remote-work or AI-tool policy changes.
Frequently Asked Questions
Is an employee handbook enough for PL-4?
Only if it includes system/ePHI behavior rules and you capture documented acknowledgment tied to access authorization.
How often must users re-acknowledge?
At least when rules are updated; many orgs also require annual re-ack.
How does PL-4 relate to AC-8?
AC-8 is the system use notification at logon; PL-4 is the broader acknowledged ruleset for behavior.
References & Resources
- NIST SP 800-53 Rev. 5 — PL-4
- Related controls: AT-2, AC-8, AC-22, PS-6, IR-6
Related Guidelines
Related controls that commonly accompany PL-4.
Need Help Implementing PL-4?
Our auditors map NIST SP 800-53 controls to your HIPAA Security Rule program — policies, technical evidence, and audit readiness.