On April 15, 2015, The PCI Security Standards Council published the PCI DSS Version 3.1. Within the update, there were 3 types of changes that were noted. They included:
Clarifications: Clarifies the intents of the requirements.
Additional Guidance: Explanations with the purpose of providing further information on the requirements.
Evolving Requirement: Changes to the requirements to keep up with emerging threats and updates within the market.