N.H. Rev. Stat. Ann. § 662-A:1

It is the purpose of this chapter to implement the provisions of part 2, article 11-a of the New Hampshire constitution regarding division of representative districts into 2 or more representative districts. To that end, the general court hereby provides a mechanism whereby a town established as a multi-member representative district may divide into 2 or more districts for the purpose of electing representatives to the general court.