Initially thought for October 2023, the second call for proposals will be finally launched by the beginning of 2024.
In Autumn more details will be announced.
However, you can start working on your project using the tools and documents related the first call for proposals, due to the fact they are also valid for the second call. In the section Resources of the Interreg Sudoe website you will find different material that will help you in the preparation of your candidacy like the candidacy kit, different webinars, documents related to the Launching Event, etc.
If you are looking for partners, you can also check and publish your project idea at CoopSudoe, the tool created by the programme that brings together all the different entities interested in submitting their proposals.