I would just like to add this.
Under the current legislation-you are right-the Border Services Agency may conduct the search if it deems it necessary. However, the bill makes no provision concerning the other officer, the superior officer, the senior officer. It is unnecessary for the senior officer to consider whether the search is really necessary or not. That is not within his or her discretion.
It's a question of whether the senior officer has the discretion to say, for instance, “I've looked at the circumstance. The traveller has come to me.” There must be some logic to the law that says the traveller can come to the senior officer, and the senior officer should be able to say, “I don't think this is necessary. This is an invasive operation. Yes, you may be authorized, junior officer, but I don't think this strip search is necessary in order to conduct a pre-clearance.”
It doesn't continue to that stage.