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"But if Beidou offers a free non-military service inside China then that idea goes out of the window," says a source close to the Galileo project, who spoke on condition of anonymity, due to the geopolitical sensitivity of the issue. It is not clear whether there are sufficient frequencies for Beidou to be used globally. But new agreements may be needed to ensure receivers are compatible with all three navigation standards: Galileo, the US-run Global Positioning System, and Beidou. "We would have to have a complete reworking of the cooperative agreements that the Galileo consortium has struck with China," the source adds.