Complex sentence: The International Council of Cruise Lines (ICCL) merged with Cruises Lines International Association (CLIA) in 2006, forming an expanded organization incorporating the existing functions of both organizations.
Split into simpler sentences: The International Council of Cruise Lines (ICCL) was an association of cruise lines. It merged with Cruise Lines International Association (CLIA) in 2006, forming an expanded organization incorporating the existing functions of both organizations.