The act was passed because in 1688 King James II of England was deposed (he was deemed to have abdicated) and replaced as monarch by William and Mary, who ruled jointly. However this could not be achieved without an
act of Parliament to approve it. Since no parliament was in existence at the time, it was necessary to convene one, but under the traditional constitution only the monarch could summon a parliament. In the absence of a monarch to do so, the members of the previous parliament convened a new one themselves, without a royal summons, instead asking William to issue the summons, which he did on 22 January 1689. This irregular Parliament sat on 13 February. They declared James to have abdicated, and then chose Mary (his daughter) and William (her husband and first cousin) to succeed him, and passed the
Bill of Rights 1689 to make it legal. (In Scotland a separate act was passed, the
Claim of Right, which stated that James had forfeited the throne by his illegal actions and his failure to take the
coronation oath.) However, doubts arose as to the validity of the Bill of Rights and the other acts passed by the Convention Parliament. Since the Parliament had not been summoned in the regular way, it was arguable that it was no parliament at all and its legislation was of no legal effect (although this occurrence was not unprecedented in English history). Therefore after the Convention Parliament was dissolved and the next parliament was summoned by the King and Queen in the normal manner, the act was passed to confirm the validity of the royal succession and the previous parliament's legislative competence. == Controversy ==