10-8. Leaders begin TLP when they receive the initial WARNORD or receive a new mission. As each subsequent order arrives, leaders modify their assessments, update tentative plans, and continue to supervise and assess preparations. In some situations, the higher headquarters may not issue the full sequence of WARNORDs; security considerations or tempo may make it impractical. Commanders carefully consider decisions to eliminate WARNORDs. Subordinate units always need to have enough information to plan and prepare for the operation. In other cases, leaders may initiate TLP before receiving a WARNORD based on existing plans and orders and on their understanding of the situation.