Sec. 18-396(a)(2)

From the ordinance

Until a regulatory floodway is designated, no new construction, substantial improvements, or other development (including fill) shall be permitted within the areas of special flood hazard, designated as Zones A1-30, AE, or AH on the FIRM, unless it is demonstrated that the cumulative effect of the proposed development... will not increase the water surface elevation of the base flood more than one (1) foot at any point within the community.