N.H. Rev. Stat. Ann. § 673:19

Upon the effective date of the abolition of a planning board, all land use control activities in the municipality formerly performed by the planning board shall cease. Existing zoning ordinances shall remain in effect following the abolition date for a period not to exceed 2 years from the date of such action, but no amendment to a zoning ordinance requiring action by the former planning board shall be permitted.