of Robert the Bruce's daughter, Marjorie, and Walter Stewart, 6th Great Steward of Scotland. Since that date, it has been enjoyed by the sovereign's eldest son. The titles "Prince of Scotland" and "Great Steward of Scotland" are normally conjoined in legislation. Use of titles Since James VI also became the King of England and Ireland in 1603, the titles have fallen from habitual use, the holder from then on usually also being Duke of Cornwall, Prince of Wales and Duke of Rothesay, which were preferred, and is now seldom referred to, except as the last in the conventional list of the Prince of Wales's titles. Similar to the process of Crown consent, Parliament shall not debate whether a bill affecting (directly or by implication) the personal property or interests of the Prince and Great Steward of Scotland be passed or approved unless such consent to those provisions has been signified at a meeting of the Parliament. In the Scottish Parliament, such consent is signified by a member of the Scottish Government. When the sovereign had no son, there has been uncertainty as to who should bear and use the titles and enjoy the revenues of the principality. Both Mary, Queen of Scots, and George II of Great Britain used the titles and styles, but on the accession of George VI there was a difference between the opinion of the Lord Lyon and the advice given by the Scottish Lords of Appeal to the Garter King of Arms. The matter remains unresolved, but is unlikely to be of practical significance for some time. References Titles in Scotland Heirs apparent