The 1534 act was issued by Elizabeth's father, Henry VIII, which arrogated ecclesiastical authority to the monarchy, but which had been repealed by Mary I.

B., do utterly testify and declare in my conscience that the Queen's Highness is the only supreme governor of this realm, and of all other her Highness's dominions and countries, as well in all spiritual or ecclesiastical things or causes, as temporal, and that no foreign prince, person, prelate, state or potentate hath or ought to have any jurisdiction, power, superiority, pre-eminence or authority ecclesiastical or spiritual within this realm; and therefore I do utterly renounce and forsake all foreign jurisdictions, powers, superiorities and authorities, and do promise that from henceforth I shall bear faith and true allegiance to the Queen's Highness, her heirs and lawful successors, and to my power shall assist and defend all jurisdictions, pre-eminences, privileges and authorities granted or belonging to the Queen's Highness, her heirs or successors, or united or annexed to the imperial crown of this realm.

However, during the early years of her reign Elizabeth practised religious clemency and tolerance, which was an attempt to harmonise the state of affairs between the Roman Catholics and the Church of England.

This was necessary for Elizabeth to establish her power fully, hold off threats of invasion from France and Spain, and to counter accusations of illegitimacy that plagued her early years.

In the last twenty years of her reign, as the Pope issued official encouragement to topple, and even kill, Elizabeth, as Jesuits infiltrated England, and as the threat of Spanish invasion loomed, Catholics became targets for oppression.

Section 8 still remains in force in Great Britain, and reads as follows: AND That suche Jurisdictions Privileges Superiorities and Preheminences Spirituall and Ecclesiasticall, as by any Spirituall or Ecclesiasticall Power or Aucthorite hathe heretofore bene or may lawfully be exercised or used for the Visitacion of the Ecclesiasticall State and Persons, and for Reformacion Order and Correccion of the same and of all maner of Errours Heresies Scismes Abuses Offences Contemptes and Enormities, shall for ever by aucthorite of this present Parliament be united and annexed to the Imperiall Crowne of this Realme: ...The words at the end were repealed in 1641 by the Abolition of High Commission Court Act 1640 (16 Cha.