1. c. 4) was an act of the Parliament of England which quickly followed the Gunpowder Plot of the same year, an attempt by English Roman Catholics to assassinate King James I and many of the Parliament.

The Act forbade Roman Catholics from practising the professions of law and medicine and from acting as a guardian or trustee; and it allowed magistrates to search their houses for arms.

The Act also provided a new oath of allegiance, which denied the power of the Pope to depose monarchs.

The recusant was to be fined £60 or to forfeit two-thirds of his land if he did not receive the sacrament of the Lord's Supper at least once a year in his Church of England parish church.

[1] The Act also made it high treason to obey the authority of Rome rather than the King.