Prince Charles must lift the veil of secrecy covering his lucrative 700-year-old royal estate and answer public requests for environmental information, a British tribunal has ruled. The First-Tier Tribunal on information rights said Thursday that Charles' 136,000-acre (55,000-hectare) estate — the Duchy of Cornwall — must abide by some of the same regulations followed by other government bodies. The ruling stems from a demand for information made by environmental activist? Michael Bruton, who was concerned over the Duchy's oyster farming plans in Port Navas, a protected area of salt meadows and mudflats about 300 miles (480 kilometers) southwest of London. The prince had argued that the estate is effectively a private inheritance and should be exempt from disclosing the information. Judge John Angel acknowledged that the estate had a “historical context which is complicated and possibly unique” but ruled that it was a public authority for the purpose of environmental information regulations, which work like freedom of information laws for environmental issues. Prince Charles' office said it was still considering whether to appeal the judgment. Contact details for Bruton could not immediately be located and an email sent to his society, Port Navas Quay Preservation, was not immediately returned. The Duchy of Cornwall was created in 1337 by Edward III for his son and heir, Prince Edward, in a bid to provide him and future heirs to the throne an income from its assets. The land is broken up over 23 counties and includes residential and business properties besides agricultural tracts. The largest chunk is in Dartmoor, in southwest England, where farmers rear cattle and sheep.