Negotiations between the United States and Iran commenced Sunday in Switzerland, with a key dispute over billions of dollars in frozen Iranian assets immediately emerging as a potential test for the fledgling interim agreement.

Regional analyst Alex Vatanka told Fox News Digital that the disagreement over who controls and monitors these funds is likely to become one of the first major implementation disputes between the two nations. The talks are taking place as Washington and Tehran begin implementing a memorandum of understanding signed on June 17.

Iranian President Masoud Pezeshkian has signaled that Tehran expects the release of approximately $24 billion to $25 billion of its funds held in Qatar. This expectation was voiced amidst discussions where former President Donald Trump has also commented on the matter, stating that frozen funds would need to be returned at some point but stressing conditions.

"There are effectively two competing narratives about the frozen funds," Vatanka explained. "Releasing frozen assets is not simply an economic question. It is one of the central political tests of trust between Tehran and Washington and will likely become one of the first major implementation disputes in the weeks ahead."

Paragraph 11 of the memorandum of understanding framework indicates that the U.S. "undertakes to make fully available" restricted and frozen Iranian funds. However, the agreement links any release to a step-by-step process contingent on compliance, rather than granting immediate, unrestricted access.