Islamic Iran pursues Jihad, or holy war, against infidels and all other non-Islamic countries. According to the Sharia, Jihad is the duty of all Muslims, especially the head of state. Therefore, by Sharia law, any treaty that smacks of a truce or peace must be entered into only out of temporary weakness, and is limited to ten years.
Iran is economically weak and is the enemy of a Sunni Muslim majority. It feels it will remain so until it gains superiority through the acquisition and manufacture of nuclear weapons, and the ballistic missiles necessary to deliver those weapons to infidels, specifically Israel, Europe, and the United States. Iran has violated every anti nuclear weapons treaty since it was taken over by Ayatollah Ruhollah Khomeini's mullah's in 1979.
It will continue to do so, regardless of any treaty, until it achieves its nuclear weapons goal. Despite any restrictions, it will continue to spin an expanding array of centrifuges, enriching uranium to weapons grade, and producing plutonium until its finally able to manufacture a nuclear weapons arsenal, long before Obama's ten year moratorium is up. Obama is like a prospector seeking gold, finding only fool's gold.
Without adequate sanctions his treaty is a fool's goal.