N.H. Rev. Stat. Ann. § 41:8-b

Upon written application of 25 or more registered voters or 2 percent of the registered voters in town, whichever is less, although in no event shall fewer than 10 registered voters be sufficient, presented to the selectmen or one of them not later than the fifth Tuesday before any annual meeting, the following question, as requested in the application, shall be submitted to the voters at the meeting: "Are you in favor of increasing the board of selectmen to 5 members?" In towns having an official ballot the question shall appear upon the ballot, pursuant to RSA 656:13. In towns where no official ballot is used, the vote on this question shall be by special ballot. After the question, squares with the words "yes" and "no" shall be printed on the ballot in which the voter may mark his or her choice, pursuant to RSA 656:13.