An Act for repealing an Act, made in the Fifty-first Year of His present Majesty, for the more effectual Administration of the Office of a Justice of the Peace, in such Parts of the Counties of Middlesex and Surry as lie in and near the Metropolis; and for making other Provisions in lieu thereof; to continue in force until the First Day of June One thousand eight hundred and twenty, and from thence until the Expiration of Six Weeks from the Commencement of the then next Session of Parliament.