# AU-02 Event Logging — NIST 800-53 Rev5 control

> FedRAMP Consolidated Rules for 2026 v2026.07.14.01 · updated 2026-07-14
> Canonical page: /control/au-2

Canonical id: `au-2` · family `AU`

> a. Identify the types of events that the system is capable of logging in support of the audit function: [event types]; b. Coordinate the event logging function with other organizational entities requiring audit-related information to guide and inform the selection criteria for events to be logged; c. Specify the following event types for logging within the system: [organization-defined event types (subset of the event types defined in [AU-2a.](#au-2_smt.a)) along with the frequency of (or situation requiring) logging for each identified event type]; d. Provide a rationale for why the event types selected for logging are deemed to be adequate to support after-the-fact investigations of incidents; and e. Review and update the event types selected for logging [frequency].

_Control title and statement: NIST SP 800-53 Rev5 catalog (the pinned commit is in `/api` under `control_text`). The FedRAMP rules reference these controls by id only; everything below is what FedRAMP says about this id._

## Rev5 baseline membership

- certification class B (in the annual independent assessment)
- certification class C (in the annual independent assessment)
- certification class D (in the annual independent assessment)

## Key Security Indicators that reach it

- `KSI-CMT-LMC` — Logging Changes (Change Management)
  Modifications to the cloud service offering are logged and monitored.
- `KSI-MLA-LET` — Logging Event Types (Monitoring, Logging, and Auditing)
  A list of information resources and event types that will be logged, monitored, and audited is maintained and persistently reviewed to ensure these activities occur.
- `KSI-MLA-OSM` — Operating SIEM Capability (Monitoring, Logging, and Auditing)
  A Security Information and Event Management (SIEM) or similar system(s) is used and persistently reviewed for centralized, tamper-resistant logging of events, activities, and changes.
- `KSI-MLA-RVL` — Reviewing Logs (Monitoring, Logging, and Auditing)
  Logs are persistently reviewed and audited.

## FedRAMP guidance

_No FedRAMP-specific guidance attaches to this control._

## Annual independent assessment

In the annual assessment subset for class B, C, D.