Cities and towns and counties, may adopt a single 18 month accounting period running from January 1 of the calendar year following adoption and ending June 30 of the next following year. Thereafter, accounting periods for such towns, cities, and counties shall run from July 1 to June 30 of the following year.
RSA 31:94-a
1969, 497:1. 1971, 454:1, eff. Aug. 29, 1971.