Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1979 , the Commission Sportive Internationale , an organization subordinate to the FIA which was at that time the rule-making body for Formula One , was dissolved and replaced by the FÃ dÃ ration Internationale du Sport Automobile , or FISA , which would serve the same function .
Simplified: They were the rule-making group for Formula One . In 1979 they were replaced by the FÃ dÃ ration Internationale du Sport Automobile , or FISA .