Simplify the following text for a Grade 6 native English-speaking person.
Original: ` Abdu ` l-Bah Ã first used the term `` Universal House of Justice '' to distinguish the supreme body from those local ` Houses of Justice ' to be established in each community , and the secondary ` Houses of Justice ' ( current BahÃ ' Ã national spiritual assemblies ) .
Simplified: He called it the Supreme House of Justice . His son , ` Abdu ` l-Bah Ã called it the Universal House of Justice , because it was going to lead all of the BahÃ ' Ã s. There will be other `` Houses of Justice '' for each country and city , but for now these are called `` Spiritual Assemblies . ''