TEHRAN, Young Journalists Club (YJC) - Yukiya Amano of the International Atomic Energy Agency said on Monday that the terms Iran accepted "are being implemented."
Amano spoke in Vienna at the start of a 35-nation IAEA board meeting.
Late August, the IAEA said Iran lived up to its commitments under the 2015 nuclear agreement.
The United Nations nuclear agency confirmed Iran's compliance with the deal, known as the Joint Comprehensive Plan of Action (JCPOA), in its latest quarterly report on August 30.
According to the report, Iran’s stock of low-enriched uranium did not exceed the agreed limit of 300 kilograms while its stock of heavy water remained below the ceiling of 130 tonnes after the country exported 19.1 tonnes.
The Islamic Republic "has not pursued the construction of the Arak ... reactor" and has not enriched uranium above low purity levels, it added.
The report comes at a time that Washington has stepped up its rhetoric and actions against the JCPOA.