The spokesman of the Majlis (parliament) Energy Committee said that the recently signed gas deal with Pakistan needed the Majlis approval to be enforced.
ILNA news agency quoted Seyyed Emad Hosseini as saying that according to the Constitution international accords were required to be approved by the Majlis.
He said that we were informed by the media that the gas deal between Iran and Pakistan had gone through, despite similar contracts being approved in the past by the Majlis.
Iran and Pakistan on Sunday formally signed an export deal in Tehran which stipulates that the Islamic republic would begin supplying its eastern neighbor natural gas from 2014.
Pakistan plans to use the gas purchased from Iran for its power sector.
Dubbed the "peace pipeline," the project has been planned since the 1990s and originally would have extended from Pakistan to its old rival, India.
New Delhi has been reluctant to join the project because of its long-running distrust of Pakistan, with whom it has fought three wars since independence in 1947.
Under a deal signed in March, Pakistan will be allowed to charge a transit fee if the proposed pipeline is eventually extended to India.
conferences on its investment opportunities in countries such as Portugal, Turkey, and Qatar.