The binding legal principles established are: (1) The word 'required' in section 50(1)(a) of PAIA should be construed as 'reasonably required' in the prevailing circumstances, and a court must determine whether an applicant has laid a proper foundation for why a document is reasonably required for the exercise or protection of rights. (2) In adjudicating whether the threshold requirement of section 50(1)(a) has been met, a court is entitled to consider not only the basis provided in the prescribed form but also the evidence adduced by the parties in affidavits. (3) The question whether a particular record is 'required' for the exercise or protection of a particular right is inextricably bound up with the facts of the matter. (4) Environmental advocacy organisations, as advocates for environmental justice, are entitled to rely on section 24 of the Constitution (the right to environmental protection) together with relevant environmental legislation (such as NEMA, NEMWA, and NWA) to satisfy the threshold requirement for obtaining information from private corporations whose activities impact the environment. (5) The acknowledged history of a corporation's operational impact on the environment is an important consideration in evaluating whether information is reasonably required. When a corporation's industrial activities impact the environment, air quality and water resources, affecting persons and communities, these activities and their effects are matters of public importance and interest. (6) Environmental legislation in South Africa (particularly NEMA) expressly recognises the importance of public participation in environmental governance, and decisions must be taken in an open and transparent manner with access to information provided in accordance with law. (7) Public interest groups advocating for environmental justice are entitled to monitor the operations of corporations and their effects on the environment, and this does not constitute an improper usurping of the state's regulatory role. Information sought by parties contemplating litigation to vindicate asserted rights is conventionally 'required for the exercise or protection of any rights' within the meaning of PAIA. (8) While PAIA distinguishes between obligations of public bodies (section 11) and private bodies (section 50), with more stringent obligations on the state, corporations operating in South Africa whose activities impact the environment must recognise that constitutional values of openness and transparency will be enforced, and there is no room for secrecy in circumstances where environmental impacts implicate public interest. (9) Historical environmental data and documentation (such as a Master Plan), even if outdated or containing alleged scientific flaws, retains importance as a baseline against which contemporary knowledge and present-day data can be compared, and such information can be valuable for examining and challenging corporate justifications for environmental practices.