After a few hours since those members of the Gill family had been subdued by the previous action of Minos' group, each of those people had already made their registrations locally.
That was not a time-consuming procedure. On the contrary, it was rapid since it consisted of only collecting basic information. After all, this was only for the local sovereign to know the numbers of inhabitants, percentages of the local population with specific characteristics, in short, helpful information in managing the city.
On the other hand, after they had done this registration, each of these people received their respective identification IDs and the opportunity to read the law book of Dry City!
Since they had subordinated themselves to the Black Plain Army, it was of fundamental importance that each of those Gill family members understood the rules of Dry City. Otherwise, it could result in unnecessary trouble for both sides.