Net Foreign Exchange compliance governs EOU/EHTP/STP/BTP operations, tying import relief to export performance and administrative oversight. The scheme establishes application and approval procedures for EOUs, EHTPs, STPs and BTPs, with LoP/LoI as operative authorization and mandatory execution of a Legal Undertaking; imports, domestic procurement and utilization of inputs and capital goods are subject to customs bonds, SION-based consumption norms and specified time limits, while NFE is the primary performance metric calculated as FOB exports less CIF value of imports and specified foreign exchange payments, monitored by Units Approval Committee and designated officers who possess powers to approve, convert, extend, adjudicate and enforce compliance.