Succession to the British throne is determined by descent, legitimacy, and religion. Under common law, the crown is inherited by an individual's children and by a childless individual's nearest collateral line. The Bill of Rights 1689 and the Act of Settlement 1701, both of them as amended in March 2015, restrict the succession to the legitimate Protestant descendants of Sophia, Electress of Hanover that are in "communion with the Church of England" (while marrying to Roman Catholics no longer disqualifies). Protestant descendants of those excluded for being Catholics are eligible to succeed.