A 999-year lease, under historic common law, is an essentially permanent lease of property. The lease locations are mainly in Britain, its former colonies, and the Commonwealth.
A former colony, the Republic of Mauritius (The Raphael Fishing Company Ltd v. The State of Mauritius & Anor (Mauritius) [2008] UKPC 43 (30 July 2008)) established legal precedent on 30 July 2008 in respect of a 1901 'permanent lease' on the Thirteen Islands of St. Brandon (Cargados Carajos) which were adjudged as being a permanent grant by the Privy Council.[1][2]