The final map has been filed with the Putnam County Clerk prior to the effective date of this subsection. Building permits issued for said lots shall be issued using the lot dimensions, yard dimensions, height of buildings, floor area of buildings, coverage of lot by building, floor area ratio, off-street parking and loading requirements as well as all other regulations in effect as of the date of signing by the Planning Board of the Town of Carmel except if, on the date of signing by the Planning Board, no Zoning Code of the Town of Carmel existed. In that case the standards of the first Zoning Code of the Town of Carmel shall be applied except to the extent that those standards may have been superseded as a result of merger under a later Zoning Code in which case the standards of the Zoning Code in effect at the time of merger shall apply.