Two or more departments may unite in co-operative work in lines germane to the duties of said departments, and the heads thereof may agree between themselves for the distribution of the expense to be incurred. The agreement may include the payment or transfer from one department to another of a lump sum, and the payment, by the department receiving the same, of all expenses incurred in such co-operative work. The Director of the Division of Budget and Accounting shall, upon due notification of the agreement, make the necessary payments, or credits and debits, from sums not otherwise under requisition by the co-operating departments.
N.J.S. § 52:14-4