For section 21 of the 1980 Act (which provides powers for the purposes of a water authority providing the whole or part of their limits of supply with a supply of water) there shall be substituted—
Without prejudice to any other powers which they may have, a water authority may, for the purposes of providing a supply of water under this Act and subject to its provisions—
(a)construct, alter, acquire by purchase, lease or otherwise, or renew or maintain, waterworks;
(b)so acquire any undertaking belonging to persons, other than a water authority, who are supplying or are authorised to supply water;
(c)so acquire premises to be used for the purposes of the authority and maintain such premises;
(d)contract with any person for a supply by him of water in bulk or otherwise; or
(e)erect and maintain a house for the use of a person employed by them for the purposes of their undertaking.”.