(a) Joint Matters. - In this chapter, the term "joint matters" means matters relating to the integrated employment of land, sea, and air forces, including matters relating to - (1) national military strategy; (2) strategic planning and contingency planning; and (3) command and control of combat operations under unified command. (b) Joint Duty Assignment. - (1) The Secretary of Defense shall by regulation define the term "joint duty assignment" for the purposes of this chapter.

That definition shall be limited to assignments in which the officer gains significant experience in joint matters and shall exclude - (A) assignments for joint training or joint education; and (B) assignments within an officer's own military department. (2) The Secretary shall publish a list showing - (A) the positions that are joint duty assignment positions under such regulation and the number of such positions and, of those positions, those that are positions held by general or flag officers and the number of such positions; and (B) of the positions listed under subparagraph (A), those that are critical joint duty assignment positions and the number of such positions and, of those positions, those that are positions held by general or flag officers and the number of such positions. (c) Clarification of "Tour of Duty". - For purposes of this chapter, a tour of duty in which an officer serves in more than one joint duty assignment within the same organization without a break between such assignments shall be considered to be a single tour of duty in a joint duty assignment.