SC-1: Policy and Procedures

Quick-reference card

What this control requires

SC-01 requires your organization to create, formally document, and distribute a policy governing how you protect system communications and enforce data-in-transit and data-at-rest safeguards. That policy must spell out purpose, scope, roles, responsibilities, management commitment, cross-departmental coordination, and compliance expectations. Without it, every other control in the System and Communications Protection family lacks the organizational mandate it needs to function.

In practice, the control goes beyond publishing a policy document. You must also develop step-by-step procedures that describe how each system and communications protection control is carried out in your environment. These procedures translate high-level policy language into operational actions your teams can follow, audit, and improve.

The control also requires you to designate a specific official responsible for managing both the policy and its procedures. That official owns the review cycle, ensuring documents stay aligned with applicable laws, executive directives, and regulations. Reviews must happen on a defined schedule and whenever triggering events occur, such as audit findings, security incidents, or regulatory changes.

Why it matters

Missing or outdated system and communications protection policies represent a governance gap that auditors flag early and frequently. Federal agencies pursuing authorization to operate (ATO) and private-sector organizations pursuing NIST SP 800-53 alignment treat SC-01 as a gating control because it establishes the authority and accountability structure for every technical safeguard in the SC family.

Failure to maintain this control introduces audit risk and may result in certification withdrawal, regulatory findings, or a material weakness notation in your assessment. Assessors evaluate whether your policy is current, whether procedures match what your teams do in practice, and whether a designated official can demonstrate ownership. A stale policy that hasn’t been reviewed since it was written signals systemic governance weakness.

The downstream consequences extend beyond the audit itself. Organizations without a maintained SC policy often lack clarity on encryption requirements, boundary protection responsibilities, and communications monitoring expectations. That ambiguity leads to inconsistent implementation across business units, which creates exploitable gaps.

What attackers exploit when SC policy is absent

• Inconsistent encryption enforcement: Without a documented standard for protecting data in transit and at rest, teams make ad hoc decisions, and attackers target the weakest link.
• Undefined boundary protection responsibilities: When no policy assigns ownership of network segmentation and perimeter controls, gaps persist between infrastructure teams.
• Stale access control lists: Procedures that aren’t reviewed after incidents or organizational changes leave outdated firewall rules and communication paths open.
• Unmonitored communications channels: Missing policy on session management and communications monitoring means lateral movement goes undetected longer.
• No incident-triggered review process: Organizations that don’t update their SC procedures after security events repeat the same configuration errors.

How to implement

SC-01 is an organizational control, which means the work centers on governance processes rather than technical configuration. The most common failure mode is treating policy creation as a one-time compliance exercise instead of an ongoing management responsibility.

For your organization

Step 1: Draft the system and communications protection policy. Start with the seven required elements from NIST assessment objectives. Your policy must define its purpose, scope, roles and responsibilities, management commitment, coordination among organizational entities, and compliance requirements. It must also align with applicable laws, directives, and regulations. Don’t restate control catalog language verbatim. Instead, translate each SC control’s intent into organizational expectations that reflect your environment.

Step 2: Develop supporting procedures. For each SC control your organization implements, write a procedure document that describes who performs the action, what tools or systems they use, what the expected outcome looks like, and how deviations are handled. Procedures should be specific enough that a new team member can follow them without tribal knowledge.

Step 3: Designate a policy owner. Assign a named official, not a role title, as the person accountable for managing the policy and procedures. This official should have the authority to coordinate across security, privacy, IT operations, and legal teams. Document this designation in your system security plan.

Step 4: Establish a review cadence and trigger events. Define how often your policy and procedures undergo scheduled review (annually at minimum for most organizations). Then list the events that trigger an out-of-cycle review, such as audit findings, security incidents, organizational restructuring, or changes to NIST SP 800-53 guidance.

Step 5: Disseminate and track acknowledgment. Distribute the approved policy to all personnel and roles it covers. Maintain records showing who received the policy and when. Governance, risk, and compliance (GRC) platforms and document management systems can automate distribution and acknowledgment tracking.

Common mistakes: Writing a generic policy template that doesn’t reference your actual systems or organizational structure. Failing to update procedures after incidents. Assigning policy ownership to a committee rather than a single accountable official.

For your vendors

When assessing whether a vendor meets SC-01, your goal is to confirm that they have a living governance framework for system and communications protection, not just a static document filed for compliance purposes.

Questionnaire questions to ask:

• Do you maintain a documented system and communications protection policy? When was it last reviewed and updated?
• Who is the designated official responsible for managing SC-related policies and procedures?
• What events trigger an out-of-cycle policy review (for example, security incidents, audit findings, regulatory changes)?
• Can you provide your SC policy’s table of contents or scope statement for review?
• How do you ensure your SC procedures reflect current operational practices rather than outdated processes?

Evidence to request:

• A copy of the system and communications protection policy (or its table of contents and revision history if the full document is sensitive).
• The most recent review record showing the date, reviewer, and changes made.
• Documentation identifying the designated policy owner by name and role.
• A sample procedure document for at least one SC control to validate specificity and currency.

Red flags:

• The policy has no revision date or hasn’t been updated in more than 18 months.
• The vendor cannot name a specific individual responsible for SC policy management.
• Procedures are generic templates with no references to the vendor’s actual systems, tools, or operational environment.
• The vendor conflates policy (what must be done) with procedures (how to do it) in a single document without clear separation.

Verification approach: Request the revision history alongside the policy itself. A healthy governance process produces a trail of dated updates with brief change descriptions. Compare the policy’s stated review frequency against the actual review dates to confirm the vendor follows its own cadence.

Evidence examples

Cross-framework mapping

Related controls

• PM-09 — Risk Management Strategy: Defines the organizational risk management strategy that directly informs the risk tolerance thresholds and control priorities documented in SC-01 policy.
• PS-08 — Personnel Sanctions: Establishes consequences for personnel who fail to comply with the system and communications protection policies and procedures required by SC-01.
• SA-08 — Security and Privacy Engineering Principles: Provides the engineering principles that SC-01 procedures should reference when defining how system and communications protection controls are designed and implemented.
• SI-12 — Information Management and Retention: Governs how long SC-01 policy documents, review records, and procedure artifacts must be retained and how they are disposed of.

Frequently asked questions

What is NIST SP 800-53 SC-01

SC-01 is the system and communications protection policy and procedures control within NIST SP 800-53 Revision 5. It requires your organization to develop, document, and disseminate a policy that defines purpose, scope, roles, management commitment, and compliance expectations for all SC family controls. You must also create supporting procedures, designate an official to manage these documents, and review them on a defined schedule and after triggering events like audit findings or security incidents.

What happens if SC-01 is not implemented

Without SC-01 in place, your organization lacks the governance foundation for every technical control in the System and Communications Protection family. Assessors will flag the absence of a documented policy and designated policy owner as a material gap during authorization assessments. This gap can delay or block your authorization to operate, trigger regulatory findings, and undermine your ability to demonstrate compliance with applicable laws and directives.

How do you audit SC-01

Auditors verify SC-01 by examining whether your system and communications protection policy addresses purpose, scope, roles, responsibilities, management commitment, coordination among entities, and compliance with applicable regulations. They confirm that a designated official manages the documents, review the revision history to validate that updates occur at the defined frequency and after triggering events, and check that procedures describe how SC controls are carried out rather than restating catalog language. They also verify that dissemination records demonstrate the policy reached all relevant personnel.

How often should SC-01 policies be reviewed and updated

NIST SP 800-53 doesn’t prescribe a fixed review interval for SC-01. Instead, it requires your organization to define its own review frequency and the events that trigger updates. Most organizations adopt an annual review cycle at minimum, supplemented by out-of-cycle reviews after audit findings, security incidents, organizational restructuring, or changes to regulatory requirements. The key audit evidence is a revision history log that demonstrates your organization follows its own stated cadence.