Section 104 of the Finance Act, 1983, is hereby amended by the substitution of the following subsection for subsection (2):

"(2) In any case in which -

(a) a return under section 103 (1) is not delivered by an assessable person to the Commissioners on or before the 1st day of October immediately following the relevant valuation date, or

(b) a return under section 103 (2) is not delivered by a person within the time specified, or

(c) the Commissioners are dissatisfied with any return made under section 103 (1) or section 103 (2),

the Commissioners may make an assessment of tax payable upon the net market value of the relevant residential property, or any part thereof, of the person on the relevant valuation date of such amount or such further amount, as, to the best of their knowledge, information (including information received from a member of the Garda Síochána) and belief, ought to be charged, levied and paid and for this purpose the Commissioners may make such estimate of the market value of any property on that valuation date as they consider necessary:

Provided that:

(i) the Commissioners may withdraw an assessment made under this subsection and make an assessment of the amount of tax payable on the basis of a return which, in their opinion, represents reasonable compliance with their requirements and which is delivered to the Commissioners within 30 days after the date of the assessment made by the Commissioners pursuant to this subsection;