Complex sentence: SLP is lead by the General National Congress, which is the highest authority in the part, and elects the Central Committee (leading body), the General Control Committee (controlling body), and General Party Court (legal body).
Split into simpler sentences: SLP is lead by the General National Congress, which is the highest authority in the party. The congress elects the Central Committee (leading body), the General Control Committee (controlling body), and General Party Court (legal body).