The Majlis approved the general outline of a bill requiring the negotiators to safeguard nuclear achievements in the talks with the major powers over Iran's nuclear program.
The motion which had undergone modification several times was brought before parliament on Sunday.
It was overwhelmingly passed in Sunday's session, where out of a total of 207 votes cast, five were abstentions, 199 in favor, and a mere three against the bill, IRNA reported.
Majlis Speaker Ali Larijani said the details of the legislation will be discussed in the open session of parliament on Tuesday.
"Modifications have been made to the bill to give the negotiators more freedom in the talks based on the framework outlined by Leader (of the Islamic Revolution Ayatollah Seyyed Ali Khamenei) and (the considerations of) the Supreme National Security Council," he added.
Elsewhere, Javad Jahangirzadeh, member of the Majlis National Security and Foreign Policy Commission, said the legislation is aimed at giving the Majlis a say on a final deal Iran and the P5+1 (the five permanent members of the United Nations Security Council plus Germany) are negotiating to finalize by the end of this month.
***Favorable Conditions
"Conditions now are more favorable than the past for achieving a deal," Jahangirzadeh told state TV on Saturday.
The text of the bill makes three points binding on the negotiating team to consider in nuclear talks with the major powers.
First, it should be stipulated in the deal that all sanctions must be completely lifted at once on the day the deal comes into force.
Second, the International Atomic Energy Agency would be allowed to conduct monitoring of nuclear sites only based on its conventional procedures and within the framework of the safeguards agreements and any access to military and security centers and sensitive non-nuclear facilities and to nuclear documents and scientists is forbidden. The relevant decisions of the SNSC must be complied with.
Third, Iran would not accept any restriction on its research and development program to enhance its nuclear knowledge and technology meant for peaceful purposes and the relevant decisions of the SNSC must be abided by.
Some members of the P5+1 have asked that Tehran allow inspection of its military sites and meetings with nuclear scientists for interview under the prospective deal, a demand vehemently ruled out by Iranian officials.
The bill would require Foreign Minister Mohammad Javad Zarif to present biannual reports to the Majlis on the progress of implementing the accord.
Under the bill, the Majlis National Security and Foreign Policy Commission would also be bound to give the Majlis biannual reports assessing the process of implementing the deal.