((a)) The Secretary of Defense shall, by regulation, establish rates for meals sold at messes to officers, civilians, and enlisted members. Such rates shall be established at a level sufficient to provide reimbursement of operating expenses and food costs to the appropriations concerned, but members of the uniformed services and civilians in a travel status receiving a per diem allowance in lieu of subsistence shall be charged at a rate of not less than $2.50 per day. Notwithstanding the preceding sentence, if the Secretary determines that it is in the best interest of the United States, the Secretary may reduce a rate for meals established under this subsection by the amount of that rate attributable to operating expenses.
((b)) For the purposes of this section, payment for meals at the rates established under this section may be made in cash or, in the case of enlisted members or civilian employees, by deduction from pay. Members of organized nonprofit youth groups sponsored at either the national or local level, when extended the privilege of visiting a military installation or when residing at a military installation pursuant to an agreement in effect on , and permitted to eat in the general mess by the commanding officer of the installation, shall pay the commuted ration cost of such meal or meals.
((c)) Spouses and dependent children of enlisted members in pay grades E–1, E–2, E–3, and E–4 may not be charged for meals sold at messes in excess of a level sufficient to cover food costs.
((d)) When the Coast Guard is not operating as a service in the Navy, the Secretary of Homeland Security shall establish rates for meals sold at Coast Guard dining facilities, provide for reimbursement of operating expenses and food costs to the appropriations concerned, and reduce the rates for such meals when the Secretary determines that it is in the best interest of the United States to do so.