3Where a drought order contains a provision authorising a water authority to prohibit or limit the use of water—
(a)the power may be exercised in relation to consumers generally, a class of consumer or a particular consumer;
(b)the authority shall (as they think appropriate)—
(i)cause notice of the prohibition or limitation to be published in one or more newspapers circulating within that part of the authority’s limits of supply which would be affected by the provision of the order; or
(ii)send notice of the prohibition or limitation to the persons to whom the prohibition or limitation will apply,
and shall take such other steps, if any, as they think appropriate for bringing the prohibition or limitation to the attention of the persons to whom the prohibition or limitation will apply; and
(c)the prohibition or limitation shall not come into operation until the expiration of the period of seventy-two hours beginning with the day on which the notice is published or, as the case may be, sent to the person in question.