(b) in every such proceeding, the court shall on the application of the tenant made within thirty days from the date of commence ment of the amending ordinance, notwithstand ing any order to the contrary, determine the amount of rent in arrears upto the date of the order as also the amount of interest thereon at six per cent per annum and costs of the suit allowable to the landlord; and direct the tenant to pay the amount so determined within such time, not exceeding ninety days, as may be fixed by the ,court, and on such payment being made within the time fixed as afore said, the_proceeding shall be disposed of as if the tenant had not committed any default; (c) the provisions of clauses (a) and (b) mutatis mutandis apply to all appeals, or application for revisions, preferred or made after the commencement of the amending ordi nance, against decrees for eviction passed before such commencement with the variation that in clause (b), for the expression "from the date of commencement of the amending ordinance" the expression "from the date of the presentation of the memorandum of appeal or application for revision" shall be substi tuted; X X X Explanation: For the purpose of this section .