There is a law in parts of Italy, if the inspectors catch someone building a house without a permit, they can order that the house be torn down. As a result, houses without permits are constructed in the middle of the night, when the inspectors are not at work. It may take weeks or months to complete, but once the house is finished, it cannot be ordered torn down, permit or not. Iran is in the same position. The UN will make great efforts to close down Irans nuclear program, but once Iran has the bomb, then closing down the nuclear program becomes moot. It's not as if someone will come to confiscate the bombs.
Pro-Russian parties seen winning Kyrgyz parliamentary elections (Reuters)
from the article: UN: Iranian uranium enrichment operating well below capacity