The #pcidss standard has been updated to v4, free to download.
Very handy and useful guidance, linked to #ISO27001, and also useful outside the payment card industry…
Full information page – PCI-DSS Resource hub
https://blog.pcisecuritystandards.org/pci-dss-v4-0-resource-hub
PCI-DSS document library
https://www.pcisecuritystandards.org/document_library
Direct download of the #pcidssv4 pdf:
https://www.pcisecuritystandards.org/documents/PCI-DSS-v4_0.pdf