6.5.1 Filing a new priority claim 

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).

The applicant cannot request further processing in respect of the time limit for introducing a new priority claim under Rule 52(2), since it is excluded by Rule 135(2).