Article 1 provides a comprehensive list of legal definitions essential for the application of Qatar's Income Tax Law, extensively updated by Law No. 11 of 2022. Key terms defined include 'Resident', 'Permanent Establishment', 'Actual Place of Management (APoM)', and 'Arm's Length Principle'. The article distinguishes between Qatari and Foreign projects and defines 'Non-Profit Organisations' based on strict religious, charitable, or social welfare criteria. It also clarifies financial terminology such as Gross Income, Net Income, Taxable Income, and various payment types including Royalties, Interest, and Fees for Technical Services to ensure consistent regulatory interpretation.