VIENNA (AP) — Key restrictions on Iran’s nuclear program imposed under an internationally negotiated deal will ease in slightly more than a decade, cutting the time Tehran would need to build a bomb to six months from present estimates of a year, according to a document obtained Monday by The Associated Press.

The document is the only part linked to last year’s deal between Iran and six foreign powers that hasn’t been made public. It was given to the AP by a diplomat whose work has focused on Iran’s nuclear program for more than a decade, and its authenticity was confirmed by another diplomat who possesses the same document.

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