Can an exception be made for maintenance of books of account as per provisions of Section 35 of the CGST Act

Yes, in case any class of taxable persons is not in a position to keep and maintain accounts in accordance with the provisions of section 35, the Commissioner may permit such class of taxable persons to maintain accounts in such manner as may be prescribed after recording the reasons for the same in writing.

(ICAI FAQ PUBLICATIONS 06-09-2017 ACCOUNTS AND RECORDS: FAQ NO. 11)