Provided also, That nothing herein-before contained shall affect—
(1)The [5 & 6 Vict. c. cx.] Act of the Session of the Fifth and Sixth Years of Her Majesty, " for better preserving the Navigation of the " River Mersey:"
(2)So much of Section Three of the [20 & 21 Vict. c. cxlvii. s. 23.] Act of the Session of the Twentieth and Twenty-first Years of Her Majesty, " to " provide for the Conservation of the River Thames, and " for the Regulation, Management, and Improvement " thereof," as empowers the Admiralty to appoint Two of the Conservators of the River Thames.