Britain's U.N. Ambassador Karen Pierce told reporters after the closed council meeting that members expressed "a lot of concern" about the December 1 test launch and stressed that the 2015 resolution doesn't say nuclear weapons must be on the missiles. The deal was meant to ensure that Iran would not attempt to secretly develop nuclear weapons, an ambition that the country always denied having.
Iran has defended its missile programme, saying that its programme or tests are not banned under any Security Council resolution, and fiercely refuses to put it on the table during negotiations.
Iran's U.N. Mission said that the country's ballistic missile program is purely defensive and a "deterrent tool against foreign threats" and declared that the country isn't violating the resolution.
Iran on Sunday defended its controversial missile programme describing it as "defensive", after the U.S. accused it of test-firing a rocket capable of hitting Europe.
"It is a grave and escalating threat, and nations around the world, not just Europe, need to do everything they can to be targeting Iran's missile program", Hook said.
Resolution 2231 says Iran is "called upon" to refrain for up to eight years from work on ballistic missiles created to deliver nuclear weapons.
For their part, France and the United Kingdom extended their former criticisms of Iranian belligerence but would only say that Saturday's launch was "inconsistent" with Resolution 2231.
US President Donald Trump's top diplomat promised on Tuesday a new democratic world order in which Washington will strengthen or jettison worldwide agreements as it sees fit to stop "bad actors" such as Russia, China and Iran from gaining.
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She added, "The global community can not keep turning a blind eye every time Iran blatantly ignores Security Council resolutions".
In keeping with pre-established talking points, the USA used the meeting to describe the latest launch - one of approximately a dozen since the nuclear deal went into effect - as an outright violation of the Security Council resolution.
Senior U.S. officials confirmed early Monday that Iran has successfully test-fired multiple nuclear-capable missiles in violation of United Nations restrictions on such activity, drawing a fierce reaction from the Trump administration, which will pressure European leaders this week to take immediate action aimed at countering Iran's latest military moves.
"Missile tests and the overall defensive capability of the Islamic Republic are for defense [purposes] and in line with our country's deterrence [policy]..."
The United States decided in May to withdraw from the 2015 nuclear deal and reimpose sanctions on Iran.
British Foreign Secretary Jeremy Hunt called the test "provocative, threatening and inconsistent" with the United Nations resolution. Those launches came a week after an assault by militants on an Iranian military parade in the southern city of Ahvaz killed 25 people.
Iran also carried out another test last week that was strongly condemned by Washington.
"Furthermore, this ballistic missile activity is destabilising and increases regional tensions", it added.