[DuncanWaring]

... the officers at the lower ranks could not have raised such an issue, as their role was limited to "only following orders."

Surely you jest!

Refusal/resignation was certainly an option.

Remember Nuremburg?

[Enterprise]

I raised the "only following orders" in response to the option of the one year rule. The officers had no option to bring up immigration rules in the context of serving a search warrant. Could they have refused? Certainly! But, they didn't.