Simplify the following text for a Grade 17 native English-speaking person.
Original: The Agency was created on December 12 , 2003 ( the same day Paul Martin became Prime Minister of Canada ) , by an order-in-council amalgamating Canada Customs ( from the now-defunct Canada Customs and Revenue Agency ) with border and enforcement personnel from the Department of Citizenship and Immigration Canada ( CIC ) and the Canadian Food Inspection Agency ( CFIA ) .
Simplified: The agency was started on December 12 , 2003 ( the same day Paul Martin became Prime Minister of Canada ) , by an order-in-council joining Canada Customs with border and law enforcement agents from the Department of Citizenship and Immigration Canada ( CIC ) and the Canadian Food Inspection Agency ( CFIA ) .