Section 138A(1) in The Central Goods and Services Tax Rules, 2017
(1)The person in charge of a conveyance shall carry-(a)the invoice or bill of supply or delivery challan, as the case may be; and(b)a copy of the e-way bill in physical form or the e-way bill number in electronic form or mapped to a Radio Frequency Identification Device embedded on to the conveyance in such manner as may be notified by the Commissioner:Provided that nothing contained in clause (b) of this sub-rule shall apply in case of movement of goods by rail or by air or vessel.[Provided further that in case of imported goods, the person in charge of a conveyance shall also carry a copy of the bill of entry filed by the importer of such goods and shall indicate the number and date of the bill of entry in Part A of FORM GST EWB-01.]