c. 2) is an act of the Parliament of the United Kingdom, passed on 28 February 1856.

The roles of First and Second Joint Commissioner had been filled by Richard Mayne and William Hay until the latter's death in 1855.

The Act also established the Assistant Commissioners as ex officio justices of the peace for all counties then partly or wholly covered by the Metropolitan Police District (i.e. Middlesex, Surrey, Hertfordshire, Essex, Kent, Berkshire and Buckinghamshire).

He was not to act as a JP, however, "at any Court of General or Quarter Sessions, or in any Matter out of Sessions, except for the Preservation of the Peace, the Prevention of Crimes, the Detention and Committal of Offenders, and in carrying into execution the Purposes of this Act and the said recited Acts" and like usual JPs could not be elected as a Member of Parliament or vote in some general elections.

The assistant commissioners were also to be "within the Provisions of the Act of the Session holden in the Fourth and Fifth Years of King William the Fourth, Chapter Twenty-four, in like Manner as if their Offices were enumerated in the Schedule to that Act".