Has exited

"And in Britain, over the course of two years, the story has spawned a laundry list of official inquiries and investigations in Britain: into illegal use of data, into illegal electoral spending, into the source of Banks’s donation, into illegal campaign co-ordination—investigations whose final results we are unlikely to know until after Britain has exited the European Union at the end of March 2019."

(The New York Review of Books.)

Does the present perfect "has exited" have a notion of the future perfect tense in the sentence above?

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I think it has.