Security requirements in an RFP typically cover topics such as secure development practices, vulnerability management, patching and support timelines, encryption for data at rest and in transit, identity and access controls, audit logging, incident notification timelines, subcontractor controls, data residency and retention, penetration testing evidence, compliance attestations, and right-to-audit provisions. The RFP also enables objective scoring by requesting documented evidence such as security certifications, control descriptions, and responses to standardized security questionnaires.
A training plan and business continuity plan are operational deliverables and do not drive vendor selection criteria. A project charter sets scope and governance at a high level, but it is not the primary procurement artifact for binding vendor security obligations. Therefore, the correct answer is Request For Proposals.