If the objector alleges that the cost of executing the work or of doing the thing required may exceed three thousand rupees, such objection shall be heard and disposed of by the municipality at a meeting, unless the Chairperson or Vice-Chairperson shall certify that such cost may not exceed three thousand rupees, in which case the objection shall be heard and disposed of by the Chairperson and the Vice-Chairperson:
     Provided that in any case in which the Chairperson or the Vice-Chairperson shall have certified his opinion and the objection shall in consequence thereof have been heard and disposed of by the Chairperson and the Vice-Chairperson, the person making the objection may, if the requisition made upon him is not withdrawn on the hearing of his objection, pay in the said sum of three thousand rupees to the municipality as the cost of executing the work or doing the thing required, whereupon such person shall be relieved of all further liability and obligation, in respect of executing the work or doing the thing required and in respect of paying the expenses thereof and the municipality itself shall execute such work or do such thing, and shall exercise all powers necessary therefor.