Customs exemption for fabrics under Special Advance Authorisation permits duty free import subject to export obligation and bond. Exemption from customs and specified ancillary duties applies to fabrics imported under a valid Special Advance Authorisation, contingent on production of the authorisation at clearance, conformity with authorisation descriptions and limits, import through prescribed ports or notified SEZs, compliance with pre import norms, execution of a bond to secure duty repayment if conditions fail, and discharge of the export obligation by physical exports of garments within the authorised period or any permitted extension.