The module explains the difference between closure and post-closure. Lists the types of facilities that are subject to closure and post-closure. It defines the difference between participation and final closure. It specifies who submits a closure plan and when a clsoure plan must be submitted, lists the steps in the process, and gives the time frame for submission. It identifies when and how a closure must be amended, and explains the time frame for notification of closure and the deadlines for beginning and completing closure. Specifies which facilities need contingent post-closure plans. Lists the elements of post-closure and cites the requirements. Specifies the conditions and timing for amending a post-closure plan, states who must certify closure and post-closure, and explains the alternatives to post-closure permits for interim status facilities.