3.2 Declaration of priority 

A declaration of priority from an earlier filing should preferably be made when the European application is filed, although this can be done at any time within 16 months of the earliest priority date claimed (see A‑III, 6.5.1). The declaration of priority must indicate the date of the priority application, the relevant state party to the Paris Convention or member of the WTO concerned and the file number.

A declaration of priority may be corrected within 16 months of the earliest priority date. This time limit cannot expire earlier than four months after the filing date date of filing (see A‑III, 6.5.2).