Explanation
An incident response plan documents the step-by-step process to follow, as well as the related roles and responsibilities pertaining to all parties involved in responding to an information security breach. A business continuity plan or disaster recovery plan would be triggered during the execution of the incident response plan in the case of a breach impacting the business continuity. A vulnerability management plan is a procedure to address technical vulnerabilities and mitigate the risk through configuration changes (patch management).

Explanation
As high-level statements, information security policies should be straightforward and easy to understand. They arc high-level and, therefore, do not address network vulnerabilities directly or the process for communicating a violation. As policies, they should provide a uniform message to all groups and user roles.