If you have an existing Geo Policy setup you can continue using it. However for any new R80.20+ policies I would strongly advise using Geo Updatable Objects instead. There is a very slight performance edge for Geo Policy as it is checked just after antispoofing long before reaching the security policy where Geo Updatable Objects are located. However Geo Updatable Objects are so much more flexible and easier to use and understand, that I'd advise against using Geo Policy going forward despite its very slight performance edge.
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