Create a district. While in inspect mode (the symbol with the house and magnifying glass) hit [Triangle]. This will put you into district inspect mode. Select a district and select the policy button. This will bring you to the district specific policy screen.
While in this screen select one policy not in place or deselect one in place. Repeat this 10 times, doing it with a different policy each time.
An easy way to do this is to make 10 small districts next to one another in an unpopulated area. Do the process for each district then just erase them.