India's Special Economic Zones date, in their present form, from the SEZ Act, 2005 and the SEZ Rules, 2006, which replaced the earlier export processing zones. Free Trade Warehousing Zones were created by the same law as a category of SEZ for trading and logistics. Both rest on a single legal idea: for its authorised operations, the zone is treated as a territory outside the customs territory of India. Everything else, the exemptions, the obligations and the accounting, follows from that.
What an SEZ is
An SEZ is a notified area developed by a developer, with units approved inside it by the Unit Approval Committee chaired by the Development Commissioner. Zones may be multi-product or sector-specific: IT and ITeS, pharmaceuticals, gems and jewellery, engineering and others. A unit's approval specifies its authorised operations, and the exemptions apply only to those.
What the unit gets:
- duty-free import of capital goods, raw materials and consumables for authorised operations;
- zero-rated supplies from domestic vendors, who treat the supply as an export;
- a single-window approval process through the Development Commissioner's office;
- the zone's infrastructure and, in practice, a regulator who deals with the unit's day-to-day questions.
What the unit owes:
- a positive Net Foreign Exchange over each five-year block, computed under Rule 53 and reported annually in the Annual Performance Report;
- duty on any goods cleared into the domestic tariff area, assessed as an import;
- compliance with the conditions of the Letter of Approval, the bond-cum-legal undertaking, and the SEZ Rules on movement of goods.
The income-tax deduction under Section 10AA was available only to units that commenced operations by 31 March 2020. Units set up since then choose an SEZ for its Customs and GST treatment, not for income tax.
What an FTWZ is
A Free Trade Warehousing Zone is an SEZ whose authorised operations are trading, warehousing and related services. A unit in an FTWZ may import goods without duty, hold them without time pressure, and carry out operations that do not amount to manufacture: sorting, re-packing, labelling, kitting, quality checks. The goods may then be re-exported or sold into India, in which case the buyer clears them on payment of duty at that point. The unit serves many clients, including foreign suppliers who want stock positioned in India before a sale is made.
The contrast with a Customs bonded warehouse matters. A bonded warehouse holds an importer's own goods under Customs control with duty deferred. An FTWZ unit is a separate enterprise inside an SEZ, subject to the Development Commissioner, able to add value and to serve third parties.



