The decision to use lethal force to stop an attack in the Persian Gulf can vary widely based on national command authority, e. g., the USA vs Britain for example.
During Gulf War I this was a problem for U. S. interdiction problems as well where multiple nations were part of the operation. General Schwarzkopf was frustrated by his inability to get clear instructions on what level of force was permitted to stop a ship refusing the standard warning to halt. At one point early in the crisis, he stated that instructions to him changed four times in 24 hours as he sought guidance on what measures could be taken to halt a tanker heading into the Gulf