N.H. Rev. Stat. Ann. § 146:13

No person shall sell, expose for sale, exchange, barter, deal in or have in his possession with intent to so deal with, any article as and for maple sugar, maple candy or maple syrup unless the same shall be made solely from the sap of the maple tree. Maple syrup is syrup made by the evaporation of maple sap or by the solution of maple concrete (sugar), and contains not more than 35 percent of water and weighs not less than 11 pounds to the gallon (231 cubic inches).