As part of the year-end accounting process and review of operating policies, Cullen Group is considering changing from the straight-line method to an accelerated method when accounting for its equipment. Your supervisor wonders how the company will report this change. It has been a few years since he took intermediate accounting, and he cannot remember whether this change would be treated in a retrospective or prospective manner. Your supervisor wants you to research the authoritative guidance on a change in accounting policy related to depreciation methods. 

Instructions
Access the IFRS authoritative literature at the IFRS website (you may register for free IFRS access at this site). When you have accessed the documents, you can use the search tool in your Internet browser to respond to the following questions. (Provide paragraph citations.)

a. What are the accounting and reporting guidelines for a change in accounting related to depreciation methods?

b. What conditions justify a change in depreciation method, as contemplated by Cullen Group?