 Entities covered by International Financial Reporting Standards (IFRS) apply a standard called IAS 37 to AROs, where the AROs are called "provisions".ARO accounting is particularly significant for remediation work needed to restore a property, such as decontaminating a nuclear power plant site, removing underground fuel storage tanks, cleanup around an oil well, or removal of improvements to a site.It does not apply to unplanned cleanup costs, such as costs incurred as a result of an accident.