This section has effect—
and any reference in this section to "the relevant purposes" is a reference to the purposes described in paragraphs (a) , (aa) and (b) above.
For the relevant purposes, the functions of an appropriate agency shall be taken to include the protection against pollution of—
For the relevant purposes, the functions of an appropriate agency shall be taken to include joining with or acting on behalf of one or more relevant undertakers for the purpose of carrying out any works or acquiring any land which at least one of the undertakers with which it joins, or on whose behalf it acts, is authorised to carry out or acquire for the purposes of—
For the relevant purposes, the functions of an appropriate agency shall be taken to include the provision of supplies of water in bulk, whether or not such supplies are provided for the purposes of, or in connection with, the carrying out of any other function of the appropriate agency .
For the relevant purposes, the functions of an appropriate agency shall be taken to include the provision of houses and other buildings for the use of persons employed by the appropriate agency and the provision of recreation grounds for persons so employed.
In this section—