295.—(1) The production by F253[an authorised person (other than a private water keeper)] of his instrument of appointment shall be a sufficient warrant for his exercising the powers conferred on an authorised person by this Act, but the production of such instrument by him shall not be necessary in exercising those powers unless he has been first required to produce it.

(2) The production by a private water keeper of the instrument of his appointment endorsed in the manner provided by section 294 shall be sufficient warrant for his exercising the powers conferred on a private water keeper by this Act.