RSA 228:49 Requested Maintenance and Repair Projects.

The commissioner may, on request of any city or town, perform work of maintenance and repair, including the furnishing of labor and materials, on any town or city road, bridge or any other property used in connection with highways, or on the request of any state department or institution, perform work of maintenance and repair, including the furnishing of labor and materials, on any property of any state department or institution, under the following conditions:
I. Upon completion of such work, the commissioner shall bill the town or city, state department or institution, therefor; and the municipality or agency shall pay said bill within 30 days after the receipt thereof. Interest at the rate of 6 percent per annum may be charged upon all bills not paid when due as herein pre