I. The historic commission district shall file a certificate of approval or a notice of disapproval pursuant to N.H. Rev. Stat. § 676:8, III within 45 days after the filing of the application for the certificate, unless the applicant agrees to a longer period of time.
II. No building permit shall be issued until a certificate of approval has been filed with the building inspector; but, in the case of disapproval, notice of disapproval shall be binding upon the building inspector or other duly delegated authority, and no permit shall be issued.
III. Failure to file the certificate within the specified period of time shall constitute approval by the commission.