The PCI Security Standards Council has published version 1.1 of the PCI Secure Software Lifecycle (SLC) Standard. The revised eligibility includes software vendors who develop software products for the payment card industry. The PCI Secure SLC Standard provides security requirements and assessment procedures for software vendors to integrate into their software development lifecycles and to validate that secure lifecycle management practices are in place. The standard also addresses errata, adds minor clarifications and aligns key terms and definitions across the standard and program documentation.
Source: https://www.helpnetsecurity.com/2021/02/23/pci-slc-1-1/