Customs bonding requirements for export oriented units mandate specified documentation for bonded warehousing and central excise registration. Customs bonding is mandatory for units under the 100% Export Oriented Unit scheme; applicants for a Private Bonded Warehousing Licence must apply to the jurisdictional Assistant/Deputy Commissioner with the warehousing-station notification, copies of Letter of Permission and Letter of Undertaking, premises details and ground plan (subject to limited sectoral exceptions), project report and manufacturing process, lists of raw materials, consumables and capital goods, and an undertaking to pay cost recovery and other charges. EOUs linked to the domestic tariff area must also obtain Central Excise registration.