The Iranian government announced in the statement on Sunday that from now on, the country will observe no operational limitations on its nuclear industry, including with regard to the capacity and level of uranium enrichment, the amount of enriched materials as well as research and development.
"By taking the fifth step in reducing its commitment, the Islamic Republic of Iran eliminates the last key operational restriction it faced under the JCPOA, which is the limitation imposed on the number of centrifuges," it said.
The statement emphasized that following this decision, Iran will continue its nuclear program only on the basis of its "technical needs."
The Iranian government, however, emphasized that it will continue to cooperate with the International Atomic Energy Agency (IAEA) as was the case in the past.
According the statement, Iran is ready to resume fulfilling its commitments under the landmark nuclear deal if sanctions imposed on the country are removed and it can avail itself of the JCPOA's benefits.
The statement concluded by obligating the Atomic Energy Organization of Iran to take all necessary measures within framework of this decision in coordination with President Hassan Rouhani.
US President Donald Trump, a stern critic of the historic deal, unilaterally pulled Washington out of the JCPOA in May 2018, and unleashed the “toughest ever” sanctions against the Islamic Republic in defiance of global criticism in an attempt to strangle the Iranian oil trade.
In response to the US unilateral move, Tehran has so far rowed back on its nuclear commitments four times in compliance with Articles 26 and 36 of the JCPOA, but stressed that its retaliatory measures will be reversible as soon as Europe finds practical ways to shield the mutual trade from the US sanctions.
As a first step, Iran increased its enriched uranium stockpile to beyond the 300 kilograms set by the JCPOA.
In the second step, Tehran began enriching uranium to purity rates beyond the JCPOA limit of 3.76 percent.
In the third phase, after the Europeans failed to meet a 60-day deadline to meet Iran’s demands and fulfill their commitments under the deal, Iran started up advanced centrifuges to boost the country's stockpile of enriched uranium and activated 20 IR-4 and 20 IR-6 centrifuges for research and development purposes.
In November, Iran began injecting gas into centrifuges at the Fordow plant as part of its fourth step away from the JCPOA under the supervision of the IAEA.