Normally the tasks for each task force are stated in order of their importance. If preferred, however, the sequence of tasks may be chronological, i.e., in the order of their execution. Each method has certain advantages, according to the nature of the situation. Where the chronological sequence is utilized, that fact is clearly indicated, in order to avoid confusion. (See also page 166). After the statement of the tasks, these subparagraphs conclude with such detailed instructions as are necessary. In cases where the entire force is listed in the task organization, the proper formulation of tasks requires that the accomplishment of all the tasks of paragraph 3 result in the accomplishment of the general plan set forth for the entire force in paragraph 2. On the other hand, where several directives are issued, each to a different part of the force, with a paragraph 2 common to all, then the accomplishment of the tasks of all of the paragraphs 3, of the several directives is properly equivalent to the accomplishment of the general plan prescribed in the common paragraph 2. Where two or more task forces have identical task assignments, only the common subparagraph need be written after the title of the task forces concerned, thus: (a) Submarine Detachment, (b) Air Patrol, (assignment of the common task or tasks). If the Train has been included as a separate force of the task organization, it will be given its tasks as to tactical and strategical movement in a separate subparagraph of paragraph 3. In order to avoid repetition, task assignments and instructions which apply to all task forces, or which pertain to the general conduct of the operation, are embodied in a final subparagraph, designated as 3(x). It is particularly necessary that there be included in this subparagraph the measures (e.g., as to cooperation, security, intelligence, and the like) pertaining to freedom of action and applicable to the force as a whole. Any tasks or instructions applicable to individual task forces, only, will have been included in the appropriate earlier subparagraph(s) (i.e., 3 (a), (b), (c), etc.). To avoid repetition in these subparagraphs, coordinating instructions applying to more than one task force may also be included, when convenient to do so, in paragraph 3 (x). Paragraph 3 (x) of Operation Plans and Battle Plans prescribes, in addition to other applicable matters, the time and/or manner of placing the plan in effect. Paragraph 4 is the logistics paragraph. It sets forth the availability of services and supplies, and describes and gives effect to the general plan for the logistics support of the operation. If the information and instructions as to logistics are long and detailed, they may be embodied in a separate logistics plan, which is referred to in paragraph 4, and is attached as an annex. Paragraph 4 is not used for assigning tasks as to movement, either for the Train or for any other subdivision of the force.