Identify the document that defines change control procedures for implementation of security patches and software modifications.
Confirm that the documented procedures require the following for all changes:
i. Documentation of impact
ii. Documented approval by authorized parties
iii. Testing of functionality to ensure the change does not adversely impact the security of the system
iv. Testing of all custom code updates for compliance with PCI DSS Requirement 6.5 (to address the vulnerabilities identified in 6.5.1 – 6.5.9)
v. Back-out procedures