The document outlining the rules and regulations for conducting UPSC examinations is the UPSC Examination Rules or the official notification published annually. This provides detailed information on examination patterns, eligibility criteria, the application process, and guidelines for candidates. It serves as a comprehensive reference for understanding the framework within which the UPSC operates and defines the conduct expected of aspirants. Keeping up with the latest version of this document is essential for candidates to remain informed about any changes that may affect their preparation.