Embracing OER as one of the most relevant assets within the Open Education movement has proved to be growing its adherence in LatAm. Although digital repositories are the channel with the largest capillarization potential for scholars and lifelong learners in the region, LatAm countries still face a great challenge when it comes to equally guaranteeing access to education. This presentation aims to showcase a case study that analyses the OA policies from 4 countries from the region and propose a sustainability model for OER digital repositories, including their copyright legislation factors.