IFRS 16 replaces IAS 17 and changes the accounting treatment of leases for lessees. It introduces a single lessee accounting model, requiring lessees to recognize assets and liabilities for leases over 12 months. For all applicable leases, lessees must recognize a right-of-use asset and a corresponding lease liability, initially measured at present value of unpaid lease payments. The new standard aims to provide a more faithful representation of leasing activities and improve comparability.