Required wherever cardholder data is stored, processed, or transmitted.
PCI DSS is a contractual standard enforced by the card brands through acquiring banks. Version 4.0 became mandatory in March 2024, with future-dated requirements effective March 2025. Validation is by self-assessment questionnaire or a Qualified Security Assessor, depending on transaction volume.
These controls exist because the platform needs them to run safely. The crosswalk reads their signed evidence against PCI DSS 4.0. Where there is no evidence, the report says gap.