443Revised estimates of rateable remuneration

443 Revised estimates of rateable remuneration (1) If, as a result of changed circumstances, an employer becomes aware that the actual rateable remuneration paid or payable by the employer in respect of a premium period exceeds, or is likely to exceed, by more than 20 per cent or such other percentage as is prescribed, the estimate of rateable remuneration given by the employer or made by the Authority in respect of that period, the employer must— (a) advise the Authority of the changed circumstances; and (b) give the Authority a revised estimate of rateable remuneration in a form approved by the Authority— within 28 days of becoming aware of the changed circumstances. (2) If the actual rateable remuneration paid or payable by an employer as at any time before the last 2 months of a premium period exceeds the estimate of rateable remuneration given by the employer or made by the Authority in respect of that premium period, the employer must— (a) advise the Authority; and (b) give the Authority a revised estimate of rateable remuneration in a form approved by the Authority— within 28 days of the actual rateable remuneration exceeding the estimate.