N.H. Rev. Stat. § 21-I:15

I. The director of procurement and support services may purchase materials and supplies in advance of requisition by state departments and institutions, and such purchases shall be a charge against each departmental or institutional appropriation upon requisition and delivery. II. The state treasurer upon presentation by the director of procurement and support services of manifests covering said supplies is authorized to pay the same from any money in the treasury not otherwise appropriated. III. The director of procurement and support services is authorized to assess a fair and equitable charge with respect to such materials and supplies, such charge to be made against the departmental or institutional appropriation upon requisition and delivery. Such charges shall be sufficiently high to defray all administrative, warehousing, processing, distribution and transportation costs incurred by the division of procurement and support services plus the cost of supplies necessary to the operation of the division. IV. The funds arising from such charges shall be separately accounted for, and are hereby appropriated to and made available for expenditure by the director of procurement and support services, subject to the approval of the commissioner of administrative services, for the purposes set forth in paragraph III.