Suggest Pathways for becoming OERu Partner.
To answer your questions, the OERu has established protocols here. Institutions must be accredited by their national (or regional) accreditation agencies in order to join the network. This is the mechanism for awarding formal academic credit.
Your point about expanding the network to incorporate testing centres will be valuable for OERu partners who are implementing a challenge examination model. However - your comments, suggestions don't appear to be related to the community source objective.