> An implementation must be a third party product that is using a product provided by the DeepSeek corporate entity.

That is not clear at all. Are open weights a "product"? The discussion of mobile app vulnerabilities treats the (freely provided, openly available) mobile app as a product. And the order is equally clear that it covers "products and services" from DeepSeek-affiliated corporate entities as well as "the DeepSeek corporate entity" itself.

I don't claim to have a definite answer; I think the order is awkwardly worded and maybe not fully developed. The footnotes I mentioned prohibit (all) procurements involving third-party "DeepSeek implementations"; that implies that a first-party (US Government) "DeepSeek implementation" would be allowed. Maybe that is intended, maybe it is not.