Triennial Parliaments Act 1664
Abbreviated title derived from Chronological Table of the Statutes: Covering the Period from 1235 to the End of 1971 (London: Her Majesty's Stationery Office. 1972)
1664 CHAPTER 1 16 Cha 2
An Act for the assembling and holding of Parliaments once in Three yeares at the least, And for the repeale of an Act entituled An Act for the preventing of Inconveniencies happening by the long Intermission of Parliaments.

Recital that 16 Car. I. c. 1. is in Derogation of the Crown.
The said Act repealed.
Whereas the Act made in the Parliament begun at Westminster the Third day of November in the Sixteenth Yeare of the Raigne of our late Soveraigne Lord King Charles of blessed Memory entituled An Act for the preventing of Inconveniencies happening by the long Intermission of Parliaments is in Derogation of His Majestyes just Rights and Prerogative inherent to the Imperiall Crowne of this Realme for the calling and assembling of Parliaments, And may be an occasion of manifold mischeifes and inconveniences, and much endanger the Peace and Safety of His Majestie, and all His Leidge People of this Realme, Be it therefore enacted by the Kings most Excellent Majestie by and with the Advice and Consent of the Lords Spirituall and Temporall and the Co[m]mons in this present Parliament assembled and by the Authoritie of the same That the said Act entituled An Act for the preventing of Inconveniencies happening by the long Intermission of Parliaments And all and every the Articles Clauses and Things therein contained is, shall be and are hereby wholly repealed annulled and utterly made void, And are hereby declared to be null and void to all intents and purposes whatsoever as if the said Act had never beene had or made, Any thing in the said Act contained to the contrary notwithstanding.
Variant reading of the text noted in The Statutes of the Realm as follows: in any wise O. [O. refers to a collection in the library of Trinity College, Cambridge]

II. No longer Intermission of Parliaments than Three Years.
And because by the auntient Lawes and Statutes of this Realme made in the Raigne of King Edward the Third Parliaments are to be held very often Your Majesties humble and loyall Subjects the Lords Spirituall and Temporall and the Co[m]mons in this present Parliament assembled most humbly doe beseech Your most Excellent Majestie, That it may be declared and enacted And bee it declared and enacted by the Authority aforesaid That hereafter the sitting and holding of Parliaments shall not be intermitted or discontinued above three yeares at the most, but that within three yeares from and after the determination of this present Parliament and soe from time to time within three yeares after the determination of any other Parliament or Parliaments, or if there be occasion more often, Your Majestie Your Heires and Successors doe issue out Your Writts for calling, assembling and holding of another Parliament to the end there may be a frequent calling assembling and holding of Parliaments once in Three yeares at the least.