You can use DAS to meet PCT priority document requirements, by requesting the International

Bureau to retrieve an earlier national or regional application that has been filed with a participating Office, or an earlier international application filed with RO/AU, RO/BR, RO/CL, RO/CN, RO/DK, RO/EA, RO/ES, RO/FI, RO/IB, RO/IN, RO/MA, RO/NL and RO/SE.

In terms of giving permission, the International Bureau is treated like any other Office of Second Filing. Even though the International Bureau runs the core systems of DAS, it cannot access your applications for use as PCT priority documents, unless you have provided it with the access code. A separate detailed User Guide on how to use DAS for PCT purposes, named “PCT and DAS”, is available on the WIPO DAS web site at https://www.wipo.int/das/en/documentation.html .

In short, the steps for furnishing priority documents for PCT purposes are as follows:

• After you have taken the necessary steps with the Office of First Filing to make your priority application available via DAS, you can request the International Bureau to obtain it by marking the corresponding check-box in the Priority details of the request form PCT/RO/101 and indicating the access code in the relevant space.
• If you filed a PCT application without DAS indications, it is also possible to provide them after filing. This can be done in the ePCT service (https://pct.wipo.int ) as an Online Action or via the Upload Documents feature. For detailed instructions on how to use ePCT, please refer to the HELP topics accessible via the ePCT home page.