Board Thread:Naruto Discussions/@comment-18016240-20160208110013/@comment-681696-20160310194232

Thekillman wrote:

They were limited in that they had to be the police (and thus a certain amount of Uchiha would always be required to be police) but it still seemed to be an actual choice.

Only if Uchiha Clan chose not to allow non-members of Uchiha Clan to join the police.