(1) A private water trust may exercise the following functions for the purpose of its water supply, water distribution and drainage functions--(a) construct, install, maintain, operate and manage trust works,(b) repair, replace, maintain, remove, extend, connect, disconnect, improve or do any other things in relation to trust works that are necessary for the purpose of carrying out their functions.
(2) A private water trust may enter into an arrangement with a landholder to provide services in relation to works that are not trust works.