A supertanker carrying about 2 million barrels of Iranian crude oil was attempting to reach the US-declared blockade line before a 20:00 UTC deadline on Tuesday, tanker monitoring service TankerTrackers.com said.
The firm said very large crude carriers typically travel at around 10 knots, suggesting the vessel was trying to make the crossing before the cutoff.
Mahmoud Nabavian lost his position as the committee's first deputy chairman, while Ebrahim Rezaei was replaced as the committee's spokesperson, according to the committee's annual leadership vote.
Ebrahim Azizi was elected committee chairman, Abbas Moghtadaei and Amir Hayat-Moghaddam were chosen as first and second deputy chairmen, Hassan Ghashghavi was elected spokesperson, and Behnam Saeedi and Yaghoub Rezazadeh became the committee's secretaries.
Critics of US negotiations
Nabavian and Rezaei had emerged as two of parliament's most vocal opponents of negotiations with Washington during and after the conflict with the United States and Israel.
Nabavian repeatedly argued that any agreement with Washington would amount to an "absolute loss" for Iran and said the country's experience of negotiations had only brought "broken promises, deception and benefits for the enemy."
He also criticized Parliament Speaker Mohammad Bagher Ghalibaf and Foreign Minister Abbas Araghchi.
Earlier this month, Nabavian also vowed to oppose what he described as a "coup," accusing unnamed political rivals of trying to sideline hardline forces.
Rezaei also said Iran was not intimidated by what he described as threats from US President Donald Trump and that the country was "ready to fight any evil."
In a separate post, he praised the Revolutionary Guards for what he described as asserting Iran's authority over the Strait of Hormuz.
Leak controversy
Nabavian also came under scrutiny after reading excerpts on state television from what he described as secret correspondence from Supreme Leader Mojtaba Khamenei on negotiations with the United States. The broadcast was cut off as he continued speaking.
Nabavian said Khamenei had repeatedly objected to the course of the talks and set conditions that were not reflected in the Iran-US memorandum of understanding, including securing compensation from the United States, preserving Iran's uranium enrichment program and maintaining exclusive Iranian control over the Strait of Hormuz. He also said Khamenei wanted Iran to begin charging some ships to transit the waterway.
State broadcaster IRIB later said Nabavian's references to classified correspondence could warrant legal action. Ghalibaf adviser Amir Ebrahim Rasouli subsequently called on authorities to identify the source of what he described as confidential state information provided to Nabavian.
Parliament returns after months
The committee reshuffle came a day after parliament returned to session, with Deputy Speaker Hamidreza Hajibabaei presiding instead of Ghalibaf.
More than 250 lawmakers attended the session, during which legislators chanted slogans calling for revenge for the killing of former supreme leader Ali Khamenei and other senior officials killed in US and Israeli strikes.
Hardline lawmakers affiliated with the Paydari Front had spent months criticizing Ghalibaf for parliament's inactivity, accusing him of preventing lawmakers from meeting in order to avoid parliamentary action against negotiations with the United States. They also repeatedly called for Araghchi's resignation over the talks.
Ghalibaf's office said at the time that the suspension of parliamentary sessions had followed instructions from security authorities.
