The only thing truly concrete that came out of the JCPOA was the substantial financial benefit to the world’s most dangerous jihadist state.
Except this:
Low-enriched uranium, which has a 3%-4% concentration of U-235, can be used to produce fuel for nuclear power plants. "Weapons-grade" uranium is 90% enriched.
Iran's uranium stockpile was reduced by 98% to 300kg (660lbs), a figure that must not be exceeded until 2031. It must also keep the stockpile's level of enrichment at 3.67%.
an had two facilities - Natanz and Fordo - where uranium hexafluoride gas was fed into centrifuges to separate out the most fissile isotope, U-235.
By January 2016, Iran had drastically reduced the number of centrifuges installed at Natanz and Fordo, and shipped tonnes of low-enriched uranium to Russia.
In addition, research and development must take place only at Natanz and be limited until 2024.
No enrichment will be permitted at Fordo until 2031, and the underground facility will be converted into a nuclear, physics and technology centre. The 1,044 centrifuges at the site will produce radioisotopes for use in medicine, agriculture, industry and science.
And this:
Iran had been building a heavy-water nuclear facility near the town of Arak. Spent fuel from a heavy-water reactor contains plutonium suitable for a nuclear bomb.
World powers had originally wanted Arak dismantled because of the proliferation risk. Under an interim nuclear deal agreed in 2013, Iran agreed not to commission or fuel the reactor.
Under the JCPOA, Iran said it would redesign the reactor so it could not be produce any weapons-grade plutonium, and that all spent fuel would be sent out of the country as long as the modified reactor exists.
Iran will not be permitted to build additional heavy-water reactors or accumulate any excess heavy water until 2031.
And this:
Inspectors from the International Atomic Energy Agency (IAEA), the global nuclear watchdog, continuously monitor Iran's declared nuclear sites and also verify that no fissile material is moved covertly to a secret location to build a bomb.
And this:
Iran also agreed to implement the Additional Protocol to their IAEA Safeguards Agreement, which allows inspectors to access any site anywhere in the country they deem suspicious.
And this:
US experts estimated then that if Iran had decided to rush to make a bomb, it would take two to three months until it had enough 90%-enriched uranium to build a nuclear weapon - the so-called "break-out time".
The Obama administration said the JCPOA would remove the key elements Iran would need to create a bomb and increase its break-out time to one year or more.