The bond would cover the amount of tax involved in the export based on estimated tax liability as assessed by the exporter himself. FORM RFD -11 under rule 96A of the CGST Rules requires furnishing a bank guarantee with bond as a security. The bank guarantee should normally not exceed 15% of the bond amount. If Commissioner is satisfied with the track record of an exporter then furnishing of bond without bank guarantee would suffice. [Refer Circular No. 4/4/2017-GST dated July 7, 2017].
(ICAI FAQ PUBLICATIONS 06-09-2017 QUESTIONS ON NOTIFICATIONS AND CIRCULARS: FAQ NO. 26)