Mandatory disclosure under the RTI Act of 2005 refers to the obligation of Public Authorities to proactively publish certain information to the public without requiring a formal request, ensuring transparency and accountability. Section 4(1)(b) outlines 17 categories of information that must be disclosed, including details on the organization's functions, procedures, employee remuneration, budget, records, and consultation arrangements. This information should be widely disseminated and easily accessible to the public