HAMILTON, Canada

The Trump administration is demanding that any future nuclear agreement with Iran must remain in force "indefinitely," according to a report by Axios on Wednesday.

Citing a US official and two sources familiar with the remarks, the report said White House envoy Steve Witkoff told a private gathering that Washington's baseline demand in ongoing negotiations is the elimination of expiration clauses on key nuclear restrictions.

The position reflects President Donald Trump's longstanding criticism of the 2015 nuclear accord negotiated under former President Barack Obama, which included provisions that gradually lifted limits on Iran's nuclear program over a period of eight to 25 years.

Trump withdrew from that agreement during his first term, arguing that its so-called "sunset provisions" undermined its durability.

According to the report, Witkoff said the US approach begins with the premise that Iran must commit to permanent compliance, effectively ruling out time-bound constraints.

The report comes as delegations from Iran and the US are set to hold a third round of indirect nuclear negotiations under Omani mediation in Geneva, Switzerland, on Thursday.

The current talks are focused on Iran's uranium enrichment capabilities and the future of its existing stockpile of enriched uranium, said the report.

Following the previous round in Geneva, both sides offered a positive overall assessment, agreeing on guiding principles expected to pave the way toward a potential agreement.