Iran may be exploiting a semantic distinction between prohibited 'tolls' and allowed 'service fees' for Strait of Hormuz passage — a distinction that Trump's deal doesn't explicitly address. International law does technically ban tolls but allows certain legitimate service charges, which could give Iran legal cover to charge ships for transit. The real uncertainty: what qualifies as a 'service' versus a disguised toll remains genuinely ambiguous in the agreement's language. Whether Iran will actually provide services to justify any fees is an open question that reporting has raised. This creates a potential crack in one of Trump's core claims about the deal — that reopening the strait would stabilize global oil markets without adding costs for shippers. But it's not yet clear how this will actually play out in practice or whether Iran will attempt to exploit this gap.