Where The appropriate assessing authority is satisfied -

(a) that a dealer has failed to furnish a return under section 32 in respect of any period before the date of assessment under section 45 or section 46 or section 48, as the case may be, for such period; and

(b) that on completion of such assessment, the said dealer is found to have not paid the full amount of net tax and interest payable for such period by the prescribed date for furnishing the return, and is liable to pay late fee as referred to sub-section (2) of section 32 in respect of such period,

such authority shall determine under subsection (1) of section 53A, the late fee, as referred to in sub-section (2) of section 32, payable at the time of assessment under section 45 or section 46 or section 48, as the case may be, for such period:

Provided that where the appropriate auditing authority is required to make assessment of net tax under sub-section (1) of section 46 in respect of any year or part of a year, such authority shall, notwithstanding the provisions of this rule, where he is satisfied that the dealer is liable to pay late fee as referred to in sub-section (2) of section 32 in respect of any period falling within such year or part of such year, determine under this rule late fee payable in respect of such period at the time of assessment under section 46 for such period:

Provided further that where a registered dealer has failed to furnish return in respect of any return period by the prescribed date or thereafter before provisional assessment is made under section 45 or assessment is made under section 46 for the said period, and on such assessment his turnover of sales, turnover of purchase or contractual transfer price, as the case may be, is determined at nil by the appropriate authority, the late fee in such a case shall, notwithstanding anything contained in clause (c) of sub rule (1) of rule 40, be determined at nil.