Contracting officers shall insert the provision at 52.207-4, Economic Purchase Quantity—Supplies, in solicitations for supplies. The provision need not be inserted if the solicitation is for a contract under the General Services Administration's multiple award schedule contract program, or if the contracting officer determines that—

(a) The Government already has the data;

(b) The data is otherwise readily available; or

(c) It is impracticable for the Government to vary its future requirements.