17.—(1) The Department must [F1publish] the results of the monitoring carried out pursuant to regulation 15 F2... in accordance with the following deadlines—

(a)for the first watch list, within 21 months of the establishment of the watch list; and every 12 months thereafter while the substance is kept on the list.

(b)for each substance included in subsequent lists, within 21 months of the inclusion of the substance in the watch list, and every 12 months thereafter while the substance is kept on the list.

(2) The [F3results] referred to in paragraph (1) must include information on the representativeness of the monitoring stations and monitoring strategy.