(1) Where there has been a change or addition to any of the information registered in accordance with regulation 4, the undertaker must provide the Agency with the relevant up to date information within 28 days beginning with—
(a) the date on which the event leading to the change or addition to the information occurred; or, if later,
(b) the date on which it becomes apparent to the undertaker that the event leading to the change or addition to the information occurred.
(2) The Agency may request confirmation from the undertaker that any or all of the information given by that undertaker for the purposes of the English register is up to date or complete.
(3) Where paragraph (2) applies, without prejudice to paragraphs (4), (6) and (8), the undertaker must within 28 days beginning with the day on which the Agency requests such confirmation—
(a) confirm that the relevant information is up to date or, where any of that information is not up to date, provide the up to date information; and
(b) where any of the information is not complete or is missing, provide the complete or missing information.
(4) Where an alteration so as to increase or decrease the capacity of a large raised reservoir is proposed to be carried out, the undertaker must notify the Agency not less than 28 days before the date of of any such alteration.
(5) A notification referred to in paragraph (4) must contain the following information—
(a) the date of the proposed commencement of the alteration;
(b) details necessary for the Agency to understand the nature and extent of the proposed work to the reservoir.
(6) Where it is proposed that the use of a large raised reservoir be abandoned under section 14 of the 1975 Act , the undertaker must notify the Agency not less than 28 days before any such proposed abandonment of use.
(7) A notification referred to in paragraph (6) must include the proposed commencement date of the abandonment of use.
(8) Where a construction, supervising or inspecting engineer is appointed, the undertaker must within 28 days beginning with the date of the appointment notify the Agency and inform it of the date of the appointment.
(9) The undertaker must notify the Agency within 28 days of the date on which an engineer ceases to be—
(a) the construction engineer before that engineer has issued a final certificate, or
(b) the supervising engineer.
(10) An undertaker who intends to cease being an undertaker must notify the Agency of—
(a) the date on which the undertaker intends to cease being the undertaker;
(b) the name and address of the person who is intended to be the new undertaker;
(c) the date on which that person is intended to become the new undertaker.
(11) Paragraphs (8) and (9) apply where a construction engineer is appointed to design and supervise any alteration to a large raised reservoir under section 6 of the 1975 Act .