Require the developer of the system, system component, or system service, at all post-design stages of the system development life cycle, to: a. Develop and implement a plan for ongoing security and privacy control assessments; b. Perform [Selection (one or more): unit; integration; system; regression] testing/evaluation [Assignment: organization-defined frequency] at [Assignment: organization-defined depth and coverage]; c. Produce evidence of the execution of the assessment plan and the results of the testing and evaluation; d. Implement a verifiable flaw remediation process; and e. Correct flaws identified during testing and evaluation.