Non-personal items are said to be inalienable as they can only be willed to the monarch's successor. The legal accuracy of this claim has never been substantiated in court. According to Cameron Cobbold, then Lord Chamberlain, speaking in 1971, minor items have occasionally been sold to help raise money for acquisitions, and duplicates of items are given away as presents within the Commonwealth. In 1995, Iain Sproat, then Secretary of State for National Heritage, told the House of Commons that selling objects was "entirely a matter for the Queen". In a 2000 television interview, the Duke of Edinburgh said that the Queen was "technically, perfectly at liberty to sell them".