ISIS posted a copy of that letter Iran sent to UN SecGen Ban Ki Moon last week. The letter, entitled The Islamic Republic of Iran’s Proposed Package for Constructive Negotiations, does not mention a suspension of uranium enrichment, a key demand of the P5+1, but it suggests the possibility of intrusive inspections and multinational enrichment on Iranian soil.

The Iranians have dangled these possibilities in the past, and although neither could prevent Tehran from diverting centrifuge technology to a clandestine facility, the added transparency would make it harder. How much so is open to debate.

What really jumped out me, however, was Iran’s proposal for:

An effort to encourage other states to control the export of nuclear material and equipment.

That’s a remarkable statement coming from a country that has decried the existing export control regime as a suppliers’ cartel bent on holding back the economic development of developing countries.

Perhaps some nuance was lost in the translation. (The original Farsi text is included in the .pdf file that ISIS posted). Either that, or Tehran is trying to head-off the regional proliferation consequences of its actions, as its Arab neighbors suddenly acquire interest in nuclear energy.