(1)For the purposes of this Act—
(a)the Port of London, together with
(b)so much (being either the whole or any part or parts) of the district or districts of one or more riparian authorities as (not being comprised in the Port of London) may be specified in an order made by the Secretary of State,
shall be a port health district (in this Act referred to as " the London port health district"), and the Common Council of the City of London shall be the port health authority for that district.
(2)The Secretary of State may by order confer on the port health authority for the London port health district (in this Act referred to as " the London port health authority ") jurisdiction over all waters and land within that port health district.
(3)The Secretary of State may by order assign to the London port health authority any of the functions, rights and liabilities—
(a)of a local authority under any enactment to which this paragraph applies,
(b)of a local authority under any local statutory provision (within the meaning of the [1963 c. 33.] London Government Act 1963) continued in force by section 87 of that Act (which relates to certain local statutory provisions in force immedately before the 1st April 1965 which were not repealed or revoked by that Act),
(c)of a local authority under any provision of Part II of Schedule 11 to that Act (which re-enacted with modifications certain enactments about public health in London), or
(d)of a local authority or a food and drugs authority under any provision of the [1955 c. 16 (4 & 5 Eliz. 2).] Food and Drugs Act 1955.
(4)Subsection (3)(a) above applies to the following enactments, that is to say—
(a)the Public Health Acts 1875 to 1925 ;
(b)the [1936 c. 49.] Public Health Act 1936 ;
(c)the Water Acts 1945 and 1948 and the [1976 c. 44.] Drought Act 1976;
(d)sections 8 and 12 of the [1953 c. 26.] Local Government (Miscellaneous Provisions) Act 1953 ;
(e)the [1956 c. 53.] Clean Air Act 1956 ;
(f)the [1961 c. 64.] Public Health Act 1961;
(g)the [1974 c. 40.] Control of Pollution Act 1974;
(h)the [1975 c. 37.] Nursing Homes Act 1975 ;
(i)section 7(1) of the [1980 c. 7.] Residential Homes Act 1980 ; and
(j)this Act except section 46.
(5)The Secretary of State may by order extend to all waters and land in the London port health district any provision under which functions, rights and liabilities may be assigned by an order under subsection (3) above, or any instrument made under any such provision, in so far as it would not otherwise so extend.
(6)The power to make an order under this section shall be exercisable by statutory instrument.