Proviso to Section 50(1)

"Provided that the interest on tax payable in respect of supplies made during a
tax period and declared in the return for the said period furnished after the due date
in accordance with the provisions of section 39, except where such return is
furnished after commencement of any proceedings under section 73 or section 74 in
respect of the said period, shall be payable on that portion of the tax which is paid by
debiting the electronic cash ledger.".