Comprehensive and Detailed 150 to 250 words of Explanation From Workday Record-to-Report/Course Guide/topics:

The IFRS operating lease contracts should be assigned an IFRS-specific book code. Book codes segregate accounting generated for different reporting bases, enabling Workday to combine common operational activity with standard-specific adjustments while preventing inappropriate duplication across financial books.

The IFRS 16 accounting method can generate asset registration, depreciation or amortization, interest, and other lease-accounting results that differ from the ASC 842 treatment. Assigning those results to an IFRS-specific book code ensures they are included in the IFRS reporting book without automatically affecting the U.S. GAAP reporting book. Workday specifically recommends using different book codes for operating leases reported under multiple standards because using the same codes can duplicate asset cost and depreciation expense.

A blank book code represents Common Book activity and is generally used for operational accounting shared by reporting bases. It would not provide the necessary separation for IFRS-specific lease treatment. Assigning both IFRS and U.S. GAAP book codes to the IFRS contract would mix accounting bases, while a tax-adjustment book code serves an unrelated reporting purpose.

Therefore, the contract's IFRS accounting method should be paired with a dedicated IFRS book code and incorporated into the applicable IFRS reporting book.

Official Workday reference: Workday - Multibook Asset Accounting for Leases ; topics: Accounting Methods, Book Codes, and Operating Leases under IFRS 16.

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