A1.1.1 Logical separation between provider and customer environments

A multi-tenant service provider must implement logical separation so that: (1) the provider itself cannot reach into any customer environment unless authorized, and (2) customers cannot reach into the provider's own environment unless authorized. Guidance: tenant environments should be isolated from one another and from the provider's infrastructure; customer-facing areas such as billing or configuration portals should be kept apart from the provider's private environment; and provider access to customer environments is handled under Requirement 8.2.3. Objective under the customized approach: the provider's environment is closed to customers, and customer environments are closed to the provider without authorization. Future-dated: treated as a best practice up to 31 March 2025 and mandatory since then.

Source: PCI DSS v4.0.1, A1.1.1. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open PCI DSS v4.0.1 in the compliance library.

Version 4.0.1 is the active version; 4.0 has been retired. Appendix A1 applies only to multi-tenant service providers, A2 only to card-present POS POI terminals that still use SSL or early TLS, and A3 only when a payment brand or acquirer requires it. Which requirements apply to you follows your validation type.