Iranian President Mahmoud Ahmadinejad will unveil his proposed cabinet members to parliament on Wednesday.
Ahmadinejad had been expected to submit his proposed list of ministers to the assembly by a Wednesday deadline.
If the president does not send the list of proposed ministers, it would be the first case of law violation by the tenth government, vice parliament speaker Mohammad-Reza Bahonar told the Mehr News Agency on Wednesday evening.
State media said Ahmadinejad would deliver a televised speech on Thursday evening, postponed from Wednesday, to introduce his proposed new cabinet to the Iranian people and talk about its goals.
Ahmadinejad announced on state television on Sunday that he planned to propose at least three women in his 21-member government.
If approved, they will be the first female ministers since the Islamic Republic was founded 30 years ago.
But some of his proposed appointments have already run into objections from MPs.
Parliamentary member Ahmad Tavakoli said that, judging from the individuals named so far, the cabinet will not have the weight required for an efficient government, the Iranian Students News Agency reported Tuesday.
In this list there are people who have not had one day of executive work, Tavakoli added.
In his first term, Ahmadinejad struggled to get approval for some of his ministers, including the oil minister.
The Iranian presidential election on June 12 has triggered days of street protests, as defeated candidates Mir Hossein Mousavi and Mehdi Karrubi claimed the ballot was rigged.
Ahmadinejad, endorsed by the country's highest authority, Ayatollah Ali Khamenei, denies allegations of fraud.