to share her husband's status", has by no means been seen as absolutely clear by government experts and lawyers upon examining the matter. In the case of the marriage of Prince Charles to Camilla Parker Bowles, in 2005, the matter was settled by the decision that Camilla, whilst legally the Princess of Wales, would only use her secondary title of Duchess of Cornwall, out of respect to public sensibilities and to her predecessor, Diana, Princess of Wales. Extraordinary law Where they have existed, dynastic house laws have often been extraordinary compared to other national laws. The house laws of the families of the Austrian and German emperors were not made public until after the fall of the monarchy in 1918. Luxembourg's grand duke has made modifications to his country's dynastic law that remain unknown to the public at present. Russia's house laws were applied—or not—at the tsar's discretion. Even today, the house laws of the dynasty that has exclusive right to succeed to the throne of Liechtenstein may not be amended by either the parliament or populace of the principality, and until the late 1990s the reigning Prince could not be dethroned except according to the house law—which stipulated that ouster was only possible by a vote of his own family members. Royal marriages Nearly all house laws have regulated dynasts' right to marry. Paul I of Russia established the house law of the Romanovs (the Pauline Laws), one of the strictest in Europe. The consorts of Russian dynasts had to be "equally born" (i.e., belong to a royal or ruling house) and be approved by the tsar. While some German dynasties included in their laws language requiring or urging the monarch to consent to any "equal" marriage, some heads of dynastic houses rejected royal matches on behalf of their family members. The French pretender denied his daughter, Princess Hélène d'Orléans, the opportunity to become Queen Consort of Britain by refusing her permission to convert to Anglicanism to marry Prince Albert Victor, Duke of Clarence. In the late 19th or early 20th centuries the monarchs of Belgium, Russia, and Spain all withheld consent from members of their families to marry for love into foreign dynasties: Grand Duke Cyril Vladimirovich of Russia and Infante Alfonso de Borbon-Orléans of Spain sought to marry a pair of sisters who were also British princesses, Princess Victoria Melita of Edinburgh and Princess Beatrice of Edinburgh,