You need someone who can sign contracts for provision of services, with guaranteed minimum availability and quality of service (and charge service fees for that). Someone you can sue for damages if things stop working. You would then get this someone certified, audited, insured, issue them a whole bunch of "recommendations" and then everyone is on familiar territory. Obviously it doesn't quite work with GPS / GLONASS but the whole Galileo business model (if such a thing ever existed) was built around it.