Simplify the following text for a Grade 10 native English-speaking person.
Original: Sabana Larga was made a municipal district of Comendador by the law 18 of 20 January 2004 ; a municipal district is a part of a municipality that has its own government .
Simplified: Sabana Larga was elevated to the category of municipal district of Comendador by the law 18 of 20 January 2004 .