TEHRAN (IRNA) –- An Iranian political science professor residing in the United States said Friday delay in passing a UNSC resolution on Iran's nuclear program is "definitely another defeat" for U.S.

Speaking with the BBC, Mansur Farhang reiterated, "The UN Security Council resolution would finally be passed in a way to represent a minimum agreement, not obligatory for any country."

The draft resolutions presented by EU troika (France, Germany, and Britain) plus the United States, have so far been rejected many times due to Russia and China objections.

According to Farhang, bans on trips by some Iranian nuclear experts, or sanctions on sale of nuclear and missile technology are quite symbolic measures, and yet no country is obliged to abide by them, in accordance with the terms of the present draft. He added, "Such a resolution would therefore impose absolutely no economic, or technical pressure against Tehran."

Focusing on British U.S. ambassador's insistence that the UNSC Resolution on Iran has to be passed before the Christmas, the Iranian political science professor said, "That is because they wish to pretend that Iran's case is an international security emergency, in order to prepare the world public opinion for their further moves."

Farhang added, "I believe the EU troika and Japan are both seriously opposed to imposing any type of economic sanctions against Iran."

Russia requested the UN Security Council on Thursday night to postpone voting on resolution about Iran's nuclear program at least until Saturday.

Iran has already rejected the EU troika's proposed resolution, inviting them back to negotiation table.