 The Parliament Acts cannot be used to force through legislation that originated in the House of Lords, so they could not have been used to enact the Civil Partnerships Act 2004 or the Constitutional Reform Act 2005.The first three measures for which the Act has been used since 1949 were not mentioned in manifestos, and hence in trying to veto them the Lords were not breaking the Salisbury convention.The Hunting Bill was mentioned in the Labour Party manifesto for the 2001 general election, so, depending upon how the convention is interpreted, the attempt to block it could be taken as a breach.