Paragraph AA-4.1.1 requires investment firm licensees that operate exclusively on a Shari'a compliant basis to apply relevant AAOIFI Financial Accounting Standards, depending on the type of Islamic finance contracts entered into. Investment firm licensees that undertake both conventional finance and Shari'a compliant transactions are required by Paragraph AA-4.1.1 to apply AAOIFI Financial Accounting Standard 18, "Islamic Financial Services Offered by Conventional Financial Institutions".