I. A municipality desiring to adopt the provisions of RSA 72:76 shall do so in accordance with the procedures set forth in RSA 72:27-a. The vote shall specify the percentage of new assessed value to be exempted, the number of years duration of the exemption following new construction, and a reference to zoning use category definitions, if applicable. The exemption shall take effect in the tax year beginning April 1 following its adoption.
II. A vote adopting RSA 72:76 shall remain in effect for a maximum of 5 tax years; provided, however, that for any application which has already been granted prior to expiration of such 5 tax year period, the exemption shall continue to apply at the rate and for the duration in effect at the time it was granted.