(1)This section applies to an amount that is payable as a result of—
(a)an amendment under section 41, 45 or 50, or a correction under section 42, to an assessment (“assessment A”),
(b)a WRA assessment made in place of or in addition to an assessment (“assessment A”), or
(c)an assessment under section 45 or 50, or a WRA determination, made in place of an assessment (“assessment A”) which ought to have been made by a person chargeable to a devolved tax.
(2)The late payment interest start date for that amount is the date which would have been the late payment interest start date if—
(a)assessment A had been complete and accurate and had been made on the date (if any) by which it was required to be made, and
(b)accordingly, the amount had been payable as a result of assessment A.