In a letter also address to the International Maritime Organization, the group that freedom of navigation "should be non-negotiable." The groups went on to say that introducing fees would also "represent a significant departure from established international practice," which could "undermine the internationally recognized legal framework governing straits used for international navigation and transit passage." Iran has repeatedly expressed willingness to charge fees for passage, but it is unclear whether the current discussions regarding passage through the waterway would involve such tolls. Reuters reported on Tuesday that Tehran is seeking to control inbound shipping through the Hormuz Strait and have oversight over outbound traffic. All inbound traffic would go through Iranian waters, while outbound traffic would go through Omani waters in coordination with Tehran.