Passage: In late 1810, George III was once again overcome by his malady following the death of his youngest daughter, Princess Amelia. Parliament agreed to follow the precedent of 1788; without the King's consent, the Lord Chancellor affixed the Great Seal of the Realm to letters patent naming Lords Commissioners. The letters patent lacked the Royal Sign Manual, but were sealed by request of resolutions passed by both Houses of Parliament. The Lords Commissioners appointed by the letters patent, in the name of the King, then signified the granting of Royal Assent to a bill that became the Regency Act 1811. Parliament restricted some of the powers of the Prince Regent (as the Prince of Wales became known). The constraints expired one year after the passage of the Act. The Prince of Wales became Prince Regent on 5 February 1811.The Regent let his ministers take full charge of government affairs, playing a far lesser role than his father. The principle that the prime minister was the person supported by a majority in the House of Commons, whether the king personally favoured him or not, became established. His governments, with little help from the Regent, presided over British policy. One of the most important political conflicts facing the country concerned Catholic emancipation, the movement to relieve Roman Catholics of various political disabilities. The Tories, led by the Prime Minister, Spencer Perceval, were opposed to Catholic emancipation, while the Whigs supported it. At the beginning of the Regency, the Prince of Wales was expected to support the Whig leader, William Grenville, 1st Baron Grenville. He did not, however, immediately put Lord Grenville and the Whigs into office. Influenced by his mother, he claimed that a sudden dismissal of the Tory government would exact too great a toll on the health of the King (a steadfast supporter of the Tories), thereby eliminating any chance of a recovery.In 1812, when it appeared highly unlikely that the King would recover, the Prince of Wales again failed to appoint a...

Question: Who is able to limit the powers of a Prince?
Parliament