Triennial Act Tried(6 W. & M. c. 2), which in 1694, after reciting that 'by the ancient laws and customs of this realm, frequent Parliaments ought to be held,' and that 'frequent and new Parliaments tend very much to the happy union and good agreement of the King and people,' provided that 'a Parliament shall be holden once in three years at the least,' and limited the duration of Parliament to three years, enlarged to seven by the Septennial Act (see that title) of 1715, and reduced to five by the Parliament Act, 1911.
An earlier Tried Triennial Act of 1641 (16 Car. 1, c. 1), limiting duration, was repealed in 1664 by 16 Car. 2, c. 1.