From the text of the deal itself? All the nuclear restrictions were for "15 years", and some for 10 years. After that? Unclear.
Surprised at the downvotes - read the text for yourself: http://www.documentcloud.org/documents/2165388-iran-deal-tex... search for 15 years, it's the plain fact of the matter, not some "talking point".
They don't normally have a set end date.
A set end date basically means Iran plans to restart activities on that date without any kind of sanction. There's a reason this deal was so heavily criticized.
>The U.N. nuclear watchdog, the International Atomic Energy Agency (IAEA), which monitors Iran’s nuclear program under the deal, confirmed in Vienna that Tehran had breached the limit.
https://www.reuters.com/article/us-mideast-iran-usa/iran-rej...
Intelligence chiefs have testified in front of congress that Iran was following through with it's end of the deal. The US then unilaterally decided to tear up the treaty and put in economic sanctions based on nothing. It's almost as if they want Iran to build nuclear weapons. It's also putting pressure on Europe to pull out of banking and business ties that were built after the embargoes were ended.
https://www.nytimes.com/2019/01/29/us/politics/kim-jong-trum...