Special Economic Zone specification designates four areas as SEZs, defining boundaries and enclosure requirements under central excise law. The notification designates the Noida, Madras, Falta and Visakhapatnam areas as Special Economic Zones under the explanatory provision to the proviso to the Central Excise Act, superseding prior notifications, and specifies for each zone the constituent villages and exhaustive lists of khasra/survey numbers, detailed perimeter boundaries, enclosure construction and fencing specifications, and relative proximity to nearby ports or airports, thereby fixing each zone's spatial scope for regulatory purposes.