| Step | Who | Action |
| 1 | Aircraft operators | Notify us of any changes which affect their registration within 30 days of the change taking place. (Fiscal Representative changes should be notified within 7 days.) Failure to do so may incur a financial penalty - see APD5400. They should return their Certificate of Registration to CCU with the change(s) recorded on it. |
| 2 | CAT | If they receive any amended certificates, send to CCU immediately for the amendment to take place. |
| 3 | CCU |
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| 4 | CAT- on receipt of the report |
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