3Where a notice under the said section 50(1) in respect of any hereditament is duly given to the rating authority by a person qualified to give it, the authority shall—
(a)in respect of the year in which the effective date of that notice falls (or so much of that year as falls after that date); and
(b)in respect of each subsequent year until that notice ceases to be in force,
send to that person a statement in writing specifying the number of the instalments by which the rates are to be paid in the year in question, the respective dates on which those instalments are to become due, and the respective amounts of those instalments:
Provided that, where the notice under the said section 50(1) is given after the service of a demand note for rates for the rate period in which the effective date of that notice falls, the requirements of sub-paragraph (a) of this paragraph shall be deemed to be satisfied if that demand note included the statement required in consequence of the notice.