Date on which reservoir designation given under section 17 or given as different designation under section 18 takes effect
19.—(1) A reservoir designation—
(a)given under section 17,
(b)given as a different designation on a periodic re-assessment under section 18,
subject to subsections (2) and (3), takes effect on the day after the date on which notice of the designation is served by the Department on the reservoir manager under the section concerned.
(2) Where a reservoir designation is given under section 17 in relation to a controlled reservoir which is being constructed or restored to use (within the meaning of Part 3), the designation takes effect on the day after the date of the final certificate in respect of those works. (Section 49 makes provision about final certificates.)
(3) Where a reservoir designation is given (as a different designation) under section 18 in relation to a controlled reservoir which is subject to alteration for the purpose of increasing or decreasing the capacity of the reservoir, the different designation takes effect on the day after the date of the final certificate in respect of those works.