Following on from the Jussieu Call in 2017 and the National Plan for Open Science from July 2018, it was clearly necessary to look for the right solutions to put the bibliodiversity the Call advocates into practice in France and at the European and international level. The report deals with three main themes - the financing of open science and the related criteria of exemplarity; international relations; and recommendations concerning Plan S. There are 42 criteria which should be used in priority to guide the choice of investments to be made in the framework of the national open science policy. France's international involvement has led to a joint official declaration with the Max Planck Gesellschaft OA2020 which clearly sets out the specif...