The City of Nashua hereby adopts the provisions of New Hampshire Revised Statutes Annotated 72-29-a, as it may be amended from time to time, relative to the surviving spouse of any person who was killed or died while on active duty in the armed forces of the United States or any of the armed forces of any of the governments associated with the United States in the wars, conflicts or armed conflicts, or combat zones set forth in RSA 72:28. The surviving spouse's tax credit shall be $2,000 for the taxes due upon the surviving spouse's real and personal property, whether residential or not, in the same municipality where the surviving spouse is a resident.