August 2026 Summaries

Service Control Policies (SCPs) in AWS Organizations act as critical guardrails by limiting permissions for accounts and organizational units, but their impactful scope can cause apprehension among teams due to the potential for widespread disruptions if misconfigured. This document explores how LocalStack's 2026.06.0 release enhances SCP usability by incorporating SCP evaluation into its IAM enforcement engine, allowing for the creation of a local AWS organization to safely test SCPs with specific conditions like region locks, IMDSv2 enforcement, and tag requirements. The tutorial guides users through setting up a sandbox environment, attaching an SCP with condition-based rules, and simulating workloads to verify SCP effectiveness through denial messages and an enhanced policy simulator. This approach provides a practical solution for testing SCPs outside of AWS's limitations, facilitating the integration of SCP evaluations into continuous integration workflows while highlighting new features like numeric and negated string condition operators for comprehensive policy testing.