Special Economic Zones (SEZs) are geographically demarcated areas within a country that have more liberal economic laws and regulations (e.g., related to trade, investment, labor, taxation) than the country's typical domestic economy. The aim is to attract foreign and domestic investment, promote exports, and generate employment.
SEZs can be categorized based on the range of activities they accommodate:
Single-Sector SEZ (or Sector-Specific SEZ): These zones are established to promote a specific industry or sector. For example:
IT/ITES SEZ (Information Technology / IT Enabled Services)
Biotechnology SEZ
Engineering SEZ
Gems and Jewellery SEZ
Port-based SEZ
Planning for a single-sector SEZ focuses on providing infrastructure and amenities tailored to the needs of that particular industry.
Multi-Sector SEZ (or Multi-Product SEZ): These zones are designed to accommodate a variety of different industries and economic activities within the same zone. They are typically larger in area and require more comprehensive infrastructure to support diverse needs.
Planning for a multi-sector SEZ involves creating a more integrated environment with different sub-zones for various industries, along with supporting infrastructure (e.g., logistics, utilities), commercial areas, and often residential, social, and recreational facilities to create a self-contained township or economic hub.
The key distinguishing feature in terms of city planning (or zone planning) is:
(b) Inclusion of multiple industries in one zone: This is the defining characteristic of a Multi-Sector SEZ. It allows for synergies between different industries and a more diversified economic base within the zone.
(a) Architectural design flexibility: This is not the primary distinction; both types can have varying degrees of design flexibility.
(c) Exclusive focus on residential development: This would be a residential township, not typically an SEZ which is focused on economic (industrial/service) activities, though SEZs can include residential areas.
(d) Greater emphasis on historical preservation: This is not a defining feature of SEZs in general, unless a specific SEZ is located in an area with historical significance.
Therefore, the inclusion of multiple industries is what distinguishes a Multi-Sector SEZ from a Single-Sector SEZ.
\[ \boxed{\text{Inclusion of multiple industries in one zone}} \]