Supporters of the late Infante Carlos, Duke of Calabria and his only son and heir, Prince Pedro, Duke of Calabria assert that Prince Carlo's renunciation was conditional on his actually inheriting both the Spanish and Two Sicilies crowns and/or that, even in that circumstances, such a renunciation did not include the position of grand master of the Constantinian order, which they regard as separate from the crown. A website [https://ordenconstantiniana.org/] of the so-called "Spanish" branch, headed by Prince Pedro, asserts that the renunciation was conditioned on facts that never arose, and that the order and the crown are governed by separate rules. Further, supporters of Infante Carlos argue that the "Act of Cannes" was legally defective and thus void. The Infante Don Carlos died on the 5 October 2015 and was succeeded by his only son, Prince Pedro, Duke of Calabria.