Simplify the following text for a Grade 11 native English-speaking person.
Original: But in some jurisdictions , there is a minimum for the number of persons starting an association , in others the association must register with the police or other official body to inform the public of the association 's existence .
Simplified: In some jurisdictions , there is a minimum for the number of persons starting an association . Some jurisdictions require that the association register with the police or other official body to inform the public of the association 's existence .