“Succession to the Crown Act”, Acts of the United Kingdom Parliament2013 (20): Section 2, (2013), http://www.legislation.gov.uk/ukpga/2013/20/2014年4月7日閲覧, "(1) A person is not disqualified from succeeding to the Crown or from possessing it as a result of marrying a person of the Roman Catholic faith. (2) Subsection (1) applies in relation to marriages occurring before the time of the coming into force of this section where the person concerned is alive at that time (as well as in relation to marriages occurring after that time)."
“Succession to the Crown Act”, Acts of the United Kingdom Parliament2013 (20): Section 3(1), (2013), http://www.legislation.gov.uk/ukpga/2013/20/2014年4月7日閲覧, "A person who (when the person marries) is one of the 6 persons next in the line of succession to the Crown must obtain the consent of Her Majesty before marrying."
“Succession to the Crown Act”, Acts of the United Kingdom Parliament2013 (20): Section 3(3), (2013), http://www.legislation.gov.uk/ukpga/2013/20/2014年4月7日閲覧, "The effect of a person's failure to comply with subsection (1) is that the person and the person's descendants from the marriage are disqualified from succeeding to the Crown."
Official statement 28 October 2011 issued at Perth, as printed in UK House of Commons Committee report: Rules of Royal Succession, p. 10 (Annex 1), published 7 December 2011 [1]
