To my knowledge, there isn't a mechanism to ensure that. Even if there were one, as the senior officials from the Department of Finance and the agency explained earlier, those companies manage to operate in accordance with the letter of the law in most cases. I'm not a lawyer, so I can't assure you that that would be the case. Having said that, even if the government could prove that companies were using tax havens, it might be difficult to deny them contracts for that reason alone.
