Which of the following is NOT included in a REC package?

The correct answer is the plan for system decommissioning. In the context of a REC (Re-Entry Clearance) package, the primary focus is on coordinating and authorizing the re-entry into an environment where diving operations might take place, rather than on decommissioning plans. The REC package typically outlines the work to be accomplished, specifies who is authorized to allow re-entry, and details the timing and personnel assigned to perform the work. Decommissioning a system generally involves processes that are separate and distinct from the immediate concerns relating to re-entry operations, which makes it logical for such a plan not to be included. Thus, it is consistent with the purpose of a REC package to exclude a decommissioning plan, as that involves a different set of considerations and procedures not relevant to immediate re-entry operations.