In case any structural defect or any other defect in workmanship, quality or provision of services or any other obligations of the promoter as per the agreement for sale relating to such development is brought to the notice of the promoter within a period of five years by the allottee from the date of handing over possession, it shall be the duty of the promoter to rectify such defects without further charge, within thirty days,provided no changes have been made by the flat owner and/or any occupant and/or society that could have caused the defect to occur