27.—(1) Where a correction is made to a charging schedule in accordance with regulation 26, the charging schedule continues to have effect and is treated as corrected as specified in the correction notice issued under regulation 26(5)(a) with effect from the date that notice is issued.
(2) Paragraph (3) applies where—
(a)the error corrected is one to which regulation 26(2)(b) applies; and
(b)as a result of the error, the chargeable amount payable in respect of a chargeable development (D) decreases.
(3) The collecting authority must—
(a)notify the affected persons in writing of the correction; and
(b)recalculate—
(i)the chargeable amount payable in respect of D, and
(ii)where relief has been granted in respect of D, the amount of relief granted.
(4) For the purposes of paragraph (3)(a) the affected persons are—
(a)where D has been commenced, the persons liable to pay CIL in respect of D;
(b)where D has not commenced, the persons on whom the collecting authority is required to serve a liability notice in respect of D(1).
(5) For the purposes of paragraph (3)(b), the amount of any relief must be recalculated by reference to the corrected charging schedule, but must otherwise be calculated on the same basis as when originally calculated and using the information available to the collecting authority at that time.
As to the requirements relating to service of a liability notice, see regulation 65.