Bank guarantee exemption: full BG may be waived where the commissioner records absence of revenue risk. A proviso is added to para 3.2 of Circular No. 58/2004-Customs permitting the jurisdictional Commissioner of Customs, for reasons recorded on file, to decide that full bank guarantee is not justified where there is an absence of risk to revenue, thereby preventing automatic elevation to full BG following past penalization and enabling case-by-case retention of BG exemptions under Advance License and EPCG schemes.