N.H. Rev. Stat. § 162-K:12
Maintenance and operation of the systems and improvements constructed under this chapter shall be under the supervision of the district administrator. The cost of maintenance and operation of the non-revenue-producing facilities together with excess of costs of operation and maintenance of revenue-producing facilities, if any, shall be charged against the development district in which it is located. The charges against each property within the district shall be in proportion to the benefit to the properties within the district 60 days before the budget submission date. The district administrator shall submit to the governing body of the municipality the maintenance and operating budget for the following year, and the prorated share of the budget to be charged to each property in the district. The budget for the district as approved by the municipality, and pursuant to RSA 32, shall contain necessary appropriations and provisions for collecting charges against affected properties in the district.
RSA 162-K:12
1979, 175:2. 2012, 186:5, eff. June 11, 2012.