Procedure for interception of conveyances clarified; detention limited to consignments with established GST violations and formal release standardised. Procedure modifications clarify that 'three working days' is replaced by 'three days' and FORM GST MOV-05 must state release with date and time. Under rule 138C(2), no repeat physical verification of a conveyance is permitted across States/UTs absent specific information of tax evasion. Pending availability of electronic forms, hard copies of prescribed notices/orders may be produced as proof of action initiated. Detention or confiscation is limited to only those goods or conveyances for which a violation of the GST Act or rules is established; in multi-consignment conveyances, only consignments lacking valid documentation may be detained.