The declaration of priority should preferably be made on filing, but can be made up to 16 months from the earliest priority date claimed. That is to say, items (i)-(iii) mentioned in A‑III, 6.5 can be supplied up to 16 months after the earliest claimed priority date. Where the priority claim is inserted after the filing date and causes a change in the earliest priority date, this 16-month period is calculated from that new earliest priority date in accordance with Art. 88(2). A priority claim inserted after the filing date cannot be used in support of a request made under Rule 56(3) or Rule 56a(4) (see A‑II, 5.4 and A‑II, 6.4).